Introducing the Tmux terminal command line usage guide

1. Command introduction:

Tmux (short for "Terminal Multiplexer"), is an excellent terminal multiplexing software, similar to GNU screen, but better than screen. tmux comes from OpenBSD and is licensed by BSD. The most intuitive benefit of using it is that after logging in to the remote host through a terminal and running tmux, you can open multiple consoles without "wasting" extra terminals to connect to the remote host. Another benefit is that when the terminal After closing, the task process running in the shell will also be interrupted. This problem can be easily solved by using tmux.

2. Usage scenarios:

1. Close the terminal and the task process in the original terminal will still not be interrupted when you open it again;

2. Two people in different places can operate the same session, and the operations of one party can be seen by the other party in real time ;

3. You can open many terminals under the flexible layout of a single screen, and then use them collaboratively ;

3. Command usage:

First install this command (EPEL repo is required under CentOS):

[root@ames ~]# cat /etc/RedHat-release 
CentOS Linux release 7.3.1611 (Core) 
[root@ames ~]# yum -y install tmux

View command usage:

[root@ames ~]# tmux --help
usage: tmux [-28lquvV] [-c shell-command] [-f file] [-L socket-name]
            [-S socket-path] [command [flags]]
[root@ames ~]#

Individual options and parameter introduction:

1. Run tmux:

[root@ames ~]# tmux

2. Create a new session: # tmux new -s SESSION-NAME

(Note: SESSION-NAME represents the session name, which can be letters or numbers)

You can also specify a session name without specifying it (not recommended): # tmux new

[root@ames ~]# tmux new -s second-tmux

3. View created sessions:

[root@ames ~]# tmux ls

4. Enter a known session: # tmux a -t SESSION-NAME or # tmux attach -t SESSION-NAME

[root@ames ~]# tmux ls
0: 1 windows (created Wed Aug 30 11:15:29 2017) [61x16]
second-tmux: 1 windows (created Wed Aug 30 11:23:51 2017) [85x16]
[root@ames ~]# tmux a -t second-tmux

5. Temporarily leave the current session:

(This command will exit from the current session, so there is a saying about reconnecting to the session later)

[root@ames ~]# tmux detach

6. Close the session: # tmux kill-session -t SESSION-NAME

(Can be executed inside or outside the session)

[root@ames ~]# tmux ls
0: 1 windows (created Wed Aug 30 11:15:29 2017) [61x16]
second-tmux: 1 windows (created Wed Aug 30 11:40:24 2017) [85x16]
[root@ames ~]# tmux kill-session -t second-tmux
[root@ames ~]# tmux ls
0: 1 windows (created Wed Aug 30 11:15:29 2017) [61x16]
[root@ames ~]#

Note: 1. Run the tmux command alone, that is, open a tmux session; 2. You cannot create a new session in the tmux session, and an error will be reported: "sessions should be nested with care, unset $TMUX to force"

4. Split screen operation:

In many cases, we need to run multiple commands and perform multiple tasks in one session. We can organize them in multiple windows in one session.

1. Split screen: divided into horizontal split screen and vertical split screen

Horizontal split screen

Shortcut keys: press ctrl b first, release and then press %

Vertical Split Screen

Shortcut keys: Press ctrl b first, release and then press "

The cursors in the split-screen window switch to each other

Shortcut keys: press ctrl b first, release and then press o

Switch tmux session terminal

Shortcut keys: press ctrl b first, release and then press s

Display time in terminal

Shortcut keys: press ctrl b first, release and then press t

Exit the time interface: press the q key

5. Other shortcut key operations

Terminate a terminal window (confirmation required)

Shortcut key: exit or press ctrl b first, release and then press &

Open a new window based on the current window

Shortcut key: press ctrl b first, release and then press c

Temporarily exit the current session

Shortcut keys: press ctrl b first, release and then press d

View panel number

Shortcut keys: press ctrl b first, release and then press q

Close all split-screen windows, that is, merge them into one window

Shortcut keys: press ctrl b first, release and press again!

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