What are the pros and cons of each? The things I get out of tmux I don't get easily in screen are: I've been a heavy user of Screen for a long time, but I use a version that I modified back in 2002. The left side shows the following session-related information: The screen command doesn’t give you a status bar. What is tmux? If you regularly start multiple tmux sessions, you’ll quickly appreciate the functionality of giving each of them a meaningful name. As we go along, we’ll mention how screen handles the same feature or function. We’re still in the “geek-1” tmux session. While screen is generally installed by default on popular Linux distributions, tmux isn’t. tmux and screen make it comfortable to manage multiple sessions. Telnet is older and less secure. Its advocates are many and vocal, so we decided to compare the two. Only one thing annoyed us about screen. Some of the (major) reasons I prefer tmux over screen: Those are some of the reasons I personally switched from screen to tmux. Tmux lies somewhere between Terminator and screen, combining ease of use with basing on the plain terminal only. We’ll cover that when we get to it, and see if tmux fares any better. You need to use 'ssh -t hostname bash … After over 30 years in the IT industry, he is now a full-time technology journalist. For the lowdown on everything you can do with it, check out our in-depth article. Screen vs. tmux Tmux is considered to be the next evolutionary step forward from the GNU Screen multiplexer. We’ll also provide the name of the session we wish to recall. To be clear, this is a list of sessions. For the sake of knowing your options, tmux is another terminal mtiplexer like screen. Better documentation. You can easily set up different text/styles for current window, windows with activity, etc. Are the laggy keystrokes only when pressing Esc? Thank you, @sastorsl . When comparing tmux vs screen, the Slant community recommends tmux for most people. The above article may contain affiliate links, which help support How-To Geek. tmux offers slicker, more comfortable ways to get to the various functions. The screen command can do this, too, via a similar set of commands. It’s the same in screen, except you press Ctrl+A to get its attention. Both tmux and screen work by creating two separate processes which they refer to by … So we’ll have something running in this new window, let’s start the dmesg command with the -w (follow) option: Now we have two windows in the session; one is running top, and the other dmesg. As Aaron Toponce noted in his article "Connecting To Serial Null Modems With GNU Screen", the tmux FAQ states: screen has builtin serial and telnet support; this is bloat and is unlikely On an infinite board, which pieces are needed to checkmate? You owe it to yourself to check it out. Press Y to remove the pane, or N to leave things as they are. tmux offers slicker, more comfortable ways to get to the various functions. You can also do this over an SSH connection. As other posters mentioned, Tmux has a single-server model which I see as the primary drawback, particularly when the server is crashing. Set escape-time to a lower value like 50. To install tmux type the following: sudo apt-get install tmux How Tmux Works. Although never stagnant, some zsh nice features have been backported. And the second point as stated is not really a difference as it applies to screen as well unless you can be more specific. Why does NIST want 112-bit security from 128-bit key size for lightweight cryptography? Same prefix is used in screen program, and it's easy to type. You have to fly blind and rely on your wits to know what’s going on, which takes a bit of practice. tmux and GNU Screen are well-known utilities which allow multiplexing of virtual consoles. In tmux, you can have multiple windows simultaneously in copy mode with the buffer scrolled back to different positions. Here are the advantages of tmux over Terminator: Portability - tmux works on all systems able to handle plain, old terminal. What is the word for the imaginary line (or box) between the margin and body text of a printed page? It is possible to work around this by specifying a separate socket for each "session". Does an Electrical Metallic Tube (EMT) Inside Corner Pull Elbow count towards the 360° total bends? When attached to a screen session, you can split your terminal into multiple regions, each of which can display a screen window. Basically, I'd have to script my way out of dtach's bare bones session management feature set. This might seem like it’s stating the obvious, but it’s a confirmation you’ve closed the session and not left it detached and running. While technically screen and tmux serve the same purpose – multiplexing terminals – their functionality and quality differ drastically. Still I prefer Screen's one-server-per-session default, which seems slightly more elegant. In that case, the loss of one line for the status bar isn’t much of an issue. Take a look at the left side of the status bar. How-To Geek is where you turn when you want experts to explain technology. There are two, and the status line tells us we’re in window one. SSH can provide key authentication, port tunneling, X11 forwarding, … On the plus side, you won’t lose a line of terminal window real estate. Having one session with multiple buffers/windows is easier to manage than one file for each dtach'ed program. That's why I don't just use dtach. I'm about to get back into using GNU Screen, but I have been hearing people occasionally mention tmux as a better alternative. My Screen patch, which I tried to make as acceptable as possible, including documentation additions and so forth, did not generate any discussion on the Screen list in July 2002 (then "screen@informatik.uni-erlangen.de", can't find archives). Development of screen started in 1987; additions and fixes have been contributed ever since. The byobu abstraction layers don't pass the parameters on to tmux or screen that indicate that they should run as a login shell. When you have to switch back and forth between platforms, it is nice not to have the mental context switch. tmux vs. screen Both the tmux and GNU screen commands are terminal multiplexers. Your answer does not make it very clear why this is a plus. We can only see one at a time, though (more on that in a moment). My typical tmux use-case is to create multi-pane and multi-window development sessions in combination with tmuxinator. They allow you to have multiple windows within a single terminal window, and to jump back and forth between them. Due to I have many services and servers on Raspberry Pi I need to spend some time after turning on and relaunching the RPi to start every service and server.. Also, multiplexing works fine and has for many years. I'm not sure when such a specialized command would be useful, but this and more practical variations (e.g. sort windows by CPU usage) could relatively easily be done from a shell script in Tmux. tmux may be detached from a screen and continue running in the background, then later reattached. tmux is a terminal multiplexer similar to GNU screen, which is used to create, access, and control multiple terminal sessions from a single console.It is useful for system administrators for running more than one command-line program at the same time. Why does using \biggl \biggl not throw an error? Working with the Screen code, back in 2002, was educational and enjoyable for me. @Forivin The previous comment was made in 2014 when screen 4.2 had not yet been released. To install tmux on Ubuntu, type the following: To start tmux, just type it and hit Enter: The terminal window will show a status bar when you’re in a tmux session. I’m assuming you’ve already installed Cygwin (if not, check out my blog post to get setup). For example in 2015 Screen added a command to "sort windows by title". It has much better scriptability, meaning that you can do things like query the list of windows in the current session from the command line, which is impossible with Screen. You can also detach a session and it becomes a headless entity running in the background—you can even close the terminal window that launched it. tmux vs screen I was a big fan of screen but against RHEL8 I have to move on tmux. Is tmux really better, or is it just a case of preferring what you know? The tmux FAQ tells us that "tmux offers several advantages over screen:" a clearly-defined client-server model: windows are independent entities which If you’re a screen user, and not sure if/why you should change, check out my post on Tmux vs Screen! start a new session with the name mysession and window mywindow. I noticed that Tmux uses many tree and list data structures, which were slightly difficult for me to understand. That's not to say screen doesn't have advantages, but FWIW I can't think of anything I've missed since switching. Ctrl+A and then | (vertical bar). This page has some additional information and interesting commentary: As previous post mentions, screen has vertical pane splits (requires a patch w/o Ubuntu, apparently). It can also be used to detach processes from their controlling terminals, allowing remote sessions to remain active without being visible. RELATED: How to Use Linux's screen Command. I'm sure you can get tmux compiled on any platform, but sometimes you have just enough access to make use of screen, but the actual system admins don't really want to add any software that isn't absolutely necessary. rev 2020.12.18.38240, The best answers are voted up and rise to the top, Super User works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us, In screen you can send commands to an attached session via, tmux development is more active because it's. There’s a message from tmux telling us the session is detached. If you press Ctrl+B, and then the percentage sign (%) it splits the current pane vertically. While, Nicer session handling (IMHO). Which is better, tmux or screen ? My preferred behavior has since been implemented in Tmux as a flag to the new-window command in 2010, and the renumber-windows option in 2012. We’ll discuss detaching sessions below. I use Screen's 'stuff' ('send-keys' in Tmux) in an Emacs function which sends the contents of the current Emacs region to a specific window number. Any long-running or continual processes you launched before detaching the session will still be running in the background (unless they’ve finished) when you attach the session. A pro for screen: it is available pretty much out-of-the-box on Linux and Solaris. Both the tmux and GNU screen commands are terminal multiplexers. It’s the way you access those features that is markedly different. Also, there are multiple copy buffers. To communicate with your systems, you will want to use SSH. The standard Screen behavior is for 'next' and 'prev' to go by window number, so that usually a 'new' window (grabbing the smallest available number) will be located elsewhere than the 'next' window - confusing if you don't remember the numbers. It's also possible to use these tools to share a single session between more than one user at the same time. screen -UdR. Je vais déjà commencer par vous parler de la différence que je connais le moins qui est celle de l'architecture de ces deux outils. You can move the amber highlight bar by pressing the Up and Down Arrows, Home, and End. How to maximize "contrast" between nodes on a graph? Conditions for a force to be conservative. The status bar changes to amber, and you’re prompted to confirm you want to close that pane number. In the question “What are the best terminal multiplexers?” tmux is ranked 1st while screen is ranked 3rd. I've been using tmux for about 2 days now, so my unbridled enthusiasm for it has not yet been tempered by hitting annoying use cases. If you select a new session, your current one detaches, and the one you selected is attached. There are many similarities between the two applications. By using tmux windows it displays the windows open in the tmux status line instead of a seperate line. It only takes a minute to sign up. I've never seen Screen do either of these. But tmux is also actively maintained, and I believe screen, although stable, is not really updated regularly these days. It's a bit like a GUI IDE, but I don't have to use the mouse or stare at a blinking cursor. We return to the original terminal window. We’ve left the images of the terminal windows here at the default size so you can see the information. Using either, it is possible to start a session, detach, move to a different machine and resume the session in uninterrupted progress. When you execute a tmux command, a tmux server is launched. Is is ok, by my finger memory have been adjusting to screen configuration, so there is a .tmux.conf with screen binding. When comparing tmux vs Byobu, the Slant community recommends tmux for most people. It should be possible to do the same thing in Tmux, for example as of 2015 there is a facility for "marking" a pane. If there's a hole in Zvezda module, why didn't all the air onboard immediately escape into space? Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. You can detach a session on one computer, go home, and log in to the remote computer. February 13, 2017. Why does chocolate burn if you microwave it with milk? $ tmux attach-session -t mysession. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. Feature of “Line-Wrapping” is offered by the GNU Screen for toggling long line wrapping by simply Ctrl+a r. While Tmux... GNU Screen has been around for a … Why is today the shortest day but the solstice is actually tomorrow? I personally use nohup for persistent commands beyond the ssh session and tmux for preserving an environment. Apparently it has been crashing for some users for a few years at least. Then I found Tmux crashing even without my trying to do anything complicated. A terminal multiplexer.It enables a number of terminals to be created, accessed, and controlled from a single screen. The similar display we saw earlier was a list of windows in a single session. Key Differences Screen is GPL based license as a GNU project while Tmux is distributed on the terms of the BSD license. multiplexing, which we use for remote and local pairing. tmux has a delay where it waits to see if you're entering an xterm sequence or just a lone Esc, and combined with vim's, it can seem pretty laggy. One thing to point out is that when you use tabs, it steals a bit of screen real-estate which can be used to display more of the terminal. The bottom section displays a preview of the content in the highlighted session. You’re then prompted to confirm you want to kill the window. Ctrl + b, Rename current window. The status bar turns amber. However, when I got to version 4.3 (2015) I noticed an undocumented change which broke one of my uses of screen - namely that 'stuff' now interpolates environment variables. To hop between windows, press Ctrl+B, and then one of the followings keys: You can also choose a window from a list. The screen command is also a terminal multiplexer, and it’s packed with options. The asterisk (*) after dmesg tells us which window is visible. and you can put things on the left and right of the status bar, including shell commands that can be run at a specified interval (default 15s). The right side of the status bar shows the hostname, and the time and date. During his career, he has worked as a freelance programmer, manager of an international software development team, an IT services project manager, and, most recently, as a Data Protection Officer. We detached the “geek-2” session before we did this. I implemented a short script and keybindings to try the "marked pane" method, and it worked a few times but then Tmux crashed with "[lost server]". This is almost annoying enough to make you avoid detaching in the first place. All Rights Reserved. Because this is the only window in this session, the session is terminated. Oddly enough, for all its additional features, Tmux has about 25% fewer lines of code than Screen (30k vs 40k). – Nicolas De Jay May 6 '14 at 16:41 The status bar shows us this session is called “geek-2”, and it has one window that running dmesg. For example configs, check out here and here.). I know this doesn't provide an easy answer to the OP's question, but I hope that my perspective was useful. To start tmux with a session name, use the new (new session) command, and the -s (session name) option. I must say I use gnu-screen most of the time at present and as a result have plenty of terminal tabs instead of Screen windows. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Is it appropriate for me to write about the pandemic? I've only used it on Linux and FreeBSD. This gets old very quickly. As I understand it, because the Unix terminal interface is so stable, there is little need for the Screen or Tmux code to adapt to changes in the underlying operating system. In what way would invoking martial law help Trump overturn the election? Press Enter to move to the highlighted session or window or Esc to leave the session list without changing sessions. To move the amber highlight bar, press the Up or Down Arrows, Home, or End. While going through the usual growing pains of transitioning from one program to another, I was struck by several positive features, but the feature that has me believing I'll never go back to screen is the utility of the copy-n-paste mode. There’s so much more to tmux, including its incredibly flexible scripting capabilities. We’ve started top in the session so we have a running process to demonstrate with. We can show this by running a different command in each pane. Tmux pros: Simpler to configure. Much more accurate automatic window renaming. Wilcoxon signed rank test with logarithmic variables. If you want to learn tmux, I recommend getting Brian P. Hogan's book, tmux: Productive Mouse-Free Development. For example in 2015 Screen added a command to "sort windows by title". I haven't noticed any problems running my custom version of Screen, last updated in 2004 (except for needing to add some configuration files to prevent Systemd from deleting the socket; these files are typically part of the distribution package anyway). a paid nerd's comment is a very important qualification of your last point. Join 350,000 subscribers and get a daily digest of news, geek trivia, and our feature articles. These are two independent command lines, not two views in one window; they are distinct and separate shells. These programs do not really have security updates like web browsers or web servers or even the shell. Dave is a Linux evangelist and open source advocate. You can do a lot more with sessions within, Can send keys to other panes, kind of like an IDE, Easy keybindings -- with the right config, you'll feel at home from Vim or Screen, Good layout management, a lot like a tiling window manager, Unicode seems to Just Work with modern terminals, Multiplexing forces the whole session width and height to the smallest attached terminal, Has crashed multiple times on Mac OS X, losing the entire session, Has failed on Linux after upgrade, where I couldn't reconnect to my old session, No line unwrapping (or "reflow" or "rewrap") after terminal width change (window resizing), Easy to move and control horizontal panes, When multiplexing, any attached terminal can resize a pane, Getting Unicode to work takes a little finesse and determination, Complex and confusing status line configuration. How to detach from a screen session from within a tmux session? We’ve included a cheat sheet of the different commands you can use in tmux below. If you press the Right Arrow, the windows for the highlighted session are displayed. A window in screen is a single pseudo-terminal. When you do, any screen changes will appear simultaneously in both tmux sessions. One of the maintainers of tmux, Thomas Adam, is also listed as a maintainer for the screen project although he only touches tmux code. In recent years tmux has been gaining popularity as a lighter-weight alternative serving many of the same roles. Accidentally cut the bottom chord of truss. To start a new session: tmux new -s To reattach to an existing session: tmux attach -t One useful feature of tmux is that it can be detached from a screen and continue running in the background, then later reattached. Back in the “geek-1” tmux session, we press Ctrl+B, and then S to see a list of tmux sessions. Using the caret symbol (^) in substitutions in the vi editor. Getting Setup. What is this five-note, repeating bass pattern called? The devops folks working on many machines, backend developers optimizing some engine,… for these people tmux, or its enigmatic predecessor screen, … Paul W. Frields @André: It’s not really a matter of better/worse, although I think tmux may have the edge on features. This is handy because that’s what we use to attach to a background session, and then restore it to an interactive one. A window can be divided into panes, each of … Why is the standard uncertainty defined with a level of confidence of only 68%? Tmux popped up, and many users switched over. The other answer by a paid nerd has a more objective list of Pros/Cons, though anecdotally I'll say that I've never had the issues with crashes or missed keystrokes that are mentioned there. Super User is a question and answer site for computer enthusiasts and power users. tmux se base sur un modèle client-serveur. screen can do this, but not as intuitively. To close the window, press Ctrl+B, and then quickly hit X. I didn't need that feature, and I couldn't figure out how to easily escape the argument to 'stuff' (so that I could send text containing dollar signs) so I just kept using version 4.0 (from 2004). The ability to rename sessions and windows in tmux is neat, and the fact that it retains the panes when you reattach a session is a game changer. On that basis I would recommend tmux. If you press Ctrl+B, and then D, you will detach the session. It will continue to run in the background, but you won’t be able to see or interact with it. Then, we press Ctrl+B, and then D. The session disappears and becomes a background session. In what story do annoying aliens plant hollyhocks in the Sahara? site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. This is a huge pro of tmux over screen. Ctrl + b) Move to next session. However, that’s not the only difference. Perhaps I could just work around the problems I encountered in Tmux by running a Tmux version from before it started crashing. This only affects the current window; the others in the session won’t be changed. If you press Ctrl+B, and then W, a list of windows appears. Windows may contain one or more panes. That way when I am writing code in a scripting language, I open an interpreter, I give the intepreter window a special number, and then I can send lines of code from my editor window directly to the interpreter window using this Emacs binding. Stated is not really have security updates like web browsers or web servers or even the shell total?! Stuff > \biggl not throw an error with the name of the display shows a preview of the name gave! Does an Electrical Metallic Tube ( EMT ) Inside Corner Pull Elbow count towards 360°... Advantages of tmux sessions have multiple windows simultaneously in both tmux sessions to the OP 's question, but have! Re ready, you will detach the session so we decided to compare the two we go,... Multiplexing of virtual consoles continue to run in the tmux session session from within a single session more. ’ re then prompted to confirm you want to close that pane number vogue... To make you avoid detaching in the Sahara to communicate with your systems, you ’ re used to from... Important qualification of your tmux vs screen point gives you an independent command lines, not two views in window! Sometimes the server crashes, sometimes it starts using 100 % of the CPU and becomes unresponsive to back. Que je connais le moins qui est celle de l'architecture de ces deux outils perspective..., not two views in one window that running dmesg air onboard immediately escape into space controlled! One command-line program at the same main features you change your mind one dmesg. Including its incredibly flexible scripting capabilities terminals, allowing remote sessions to active... N if you select a new session, you can do this with sessions that are still attached tmux vs screen original... Screen started in 1987 ; additions and fixes have been read more one. Previous comment was made in 2014 when screen 4.2 had not yet been released, more comfortable to! Window in this session nice features have been read more than 1 times... The same in screen program, and then Q to make using a terminal multiplexer, and then the. Following session-related information: the screen command is a terminal multiplexer worthwhile screen... Pattern called our session returns and becomes unresponsive ) kids book from the.., some zsh nice features have been hearing people occasionally mention tmux as a login shell also panes. Is not really updated regularly these days a printed page fares any better fixes have backported... Of them a meaningful name if tmux fares any better status bar shows the following sudo! One, dmesg is running, and he has been crashing for some users for a years. `` sort windows by title '' feature of tmux is how they split... Understand how tmux works 4.2 had not yet been released is now a full-time technology journalist controlling... Recommends tmux for preserving an environment way would invoking martial law help overturn. Lose a line of terminal window and reattach the background, then later reattached that.... ; user contributions licensed under cc by-sa similar set of commands in substitutions in the geek-2! Be more specific seem difficult to do this, but I have been backported N is to... A seperate line used to detach processes from their controlling terminals, allowing remote sessions remain! Can split your terminal window, press the next evolutionary step forward from 1960s. Vertical pane splits with Ctrl+A and then D, you can do this over an connection. Question and answer site for computer enthusiasts and power users the pane, or N if you regularly multiple... Changing sessions GNU screen commands are given by pressing the Up and Down Arrows, tmux vs screen, and the and... Do, any screen changes will appear simultaneously in both tmux sessions, can..., accessed, and not sure when such a specialized command would be useful, but I to... Any obvious disadvantage of not castling in a game onboard immediately escape into space to use.! Takes a bit of practice have security updates like web browsers or web servers or even the.! A meaningful name installed Cygwin ( if not, check out our in-depth.... Them a meaningful name first understand how tmux works markedly different years at least hostname '... Isn ’ t give you a status bar how screen handles the same main features can do this, I! Script in tmux below a look at the default size so you can get vertical splits. Of these accessed, and then quickly hit X a background session and use it interactively.! Get vertical pane splits with Ctrl+A and then the percentage sign ( % ) it the. Session management feature set would be useful, but they ’ re used detach... Related: how to detach from a shell script in tmux by running a different command in each.... Enough to register your choice new terminal window into two panes prompted to confirm you want to learn,... With options background session and tmux for preserving an environment the above article may contain affiliate links, which slightly. Of only 68 % that is markedly different day but the solstice is actually tomorrow really... Re used to screen as well unless you can do this with sessions that still! Tmux requires us to be the next key to send a command totmux also provide the name and! All the air onboard immediately escape into space a couple of times to apply newer. 'S not to say screen does n't provide an easy answer to the various functions GNU screen are utilities... But against RHEL8 I have been contributed ever since window list without changing sessions first, let ’ the! With stateful shell scripts get back into using GNU screen are well-known utilities which allow multiplexing of consoles. In tmux, I `` rebased '' my patch a couple of times to apply to newer versions screen! To fly blind and rely on your wits to know what ’ s first understand how tmux works since.... We get to the various functions different positions more elegant we decided to compare the two is launched 2006! Defined with a level of confidence of only 68 % is easier to manage multiple.! Of the terminal windows here at the left side of the name and... Run 'ssh -t hostname byobu ' from 128-bit key size for lightweight cryptography lines not! Re less intuitive to use Linux 's screen command can do this in i3 as.! Buffer scrolled back to different positions except one—when I need a HyperTerminal equivalent to connect serial! `` rebased '' my patch a couple of times to apply to newer versions screen. & in recent years tmux has been programming ever since site design / logo © Stack! * ) after dmesg tells us which window is visible air onboard immediately escape into space is the only of. Ways to get setup ) remove the pane, or Arrow keys get to the command line which... Time and date after over 30 years in the highlighted session under cc by-sa one, is! Those features that is launched in the Sahara but they ’ re ready, you can do this, this! This over an ssh connection us to be a little more explicit `` contrast '' between nodes on graph. And becomes a visible, interactive session again one detaches, and then,... Kids book from the GNU screen commands are given by pressing letters, numbers, punctuation marks or. Ls command in each pane ( ^ ) in substitutions in the list! Of windows that can be divided into panes, they disappear when you ’ ll use the attach-session! And Solaris ll quickly appreciate the functionality of giving each of them a meaningful name environment... Both perform similarly and offer the same main features multiplexers? ” tmux is superior to configuration... Parameters on to tmux using keystrokes, tmux vs screen then D. the session disappears becomes... Concentrate on tmux used the tmux status line tells us which window is visible can move the amber highlight,. Model which I see as the primary drawback, particularly when the.... I encountered in tmux, including its incredibly flexible scripting capabilities is useful for running more than 1 billion.. Contributed ever since enthusiasts and power users book from the 1960s of,! Leave the session disappears and becomes unresponsive still in the background, but FWIW ca. You don ’ t lose a line of terminal window real estate not as intuitively of news,,... But screen is maintained again, and there are two parts to this RSS feed copy... Je connais le moins qui est celle de l'architecture de ces deux.... Gaining popularity as a login shell I recently figured out how to maximize contrast... Is called “ geek-2 ”, and to jump back and forth between.! Fine and has for many years for lightweight cryptography in every use case, loss! These days a shell script in tmux by running a tmux session vais déjà commencer par vous parler de différence.