One Day Command-screen
screen
Multiple Terminal Window Manager, which allows you to connect multiple local or remote sessions simultaneously and switch freely
Use: screen [ -options ] [ cmd [ args ] ] screen -r [[pid.]tty[.host]] screen -r sessionowner/[[pid.]tty[.host]] -A Resize all windows to current terminal size -c file Read the specified configuration file -d Peel off sessions running elsewhere -D Peel and exit remote session -h Set the command history size for rollback -l Log logon status(Log to/var/run/utmp)，-ln Close -ls Show all session connections -L Turn on output logging -m Ignore current process variables and create a new session -r [session] Return to the detached session -R Return to the detached session and create a new one if it cannot be found -s shell Specifies the shell -S name Create a session and specify a name -t title Set Title -wipe [match] Clean up unusable sessions -x Restore previous sessions
Identify terminal, session, window concepts
Terminal: Open an ssh connection remotely, indicating that a login terminal is opened
Session: Open a screen session, such as screen-S help to open a session help
Window: Enter the screen session, you can set up multiple windows, such as splitting windows by shortcut C-a S
screen -S help //Create a new session help screen -ls //List all sessions screen -r num //Reconnect session with specified num or name, previous operation still in progress screen -r help //Back to session help screen -d help //Peel Session help screen -d -r help2 //End the current session and return to the specified session exit //Exit screen session, prompt screen is terminating
Shortcut keys in screen session, the following shortcut keys are all started with Ctrl+a, omitted below, no longer explained
Ctrl+a? Show all shortcuts
c. Create a new shell window and toggle, exit closes or exits
A Rename the current window, enter a new name, and return
d. Divide session, temporarily disconnect current session
k. Interrupt the current session, close windows and running processes in windows, with exit
n Switch to the next window
p Switch to the previous window
0-9 Switch to 0-9 specified window
w Lists all current windows, * sign indicates the current window
If a longer operation is required, the screen command can be used to avoid interruption of command execution due to network disconnection:
screen
yes
Disconnect, reconnect
screen -ls
screen -r
Command Continue
Exit screen window after exit //command execution
screen Remote Help:
Both terminals connect to the same host via ssh
Screen-S help //Create a session help at Terminal 1
Screen-x help //Join session help on Terminal 2, multiple terminals can be joined at the same time, and commands are displayed instantly
Exit //When a terminal exits, all screen sessions exit
Shortcut definition in man screen:
The following table shows the default key bindings:
C-a ? (help) View shortcut list
C-a ' (select) input num or name，Jump directly to the specified num or name Sessions
C-a " (windowlist -b) Show a list of all sessions, arrow keys, enter
C-a 0-9 (select 0-9) Select the specified session, you can first pass through the C-a w Show all sessions
C-a tab (focus) Switch to Next Session
C-a C-a (other) Jump between current session and previous session
C-a a (meta) Send the command character (C-a) to window. See escape command.
C-a A (title) Set the name of the current window name
C-a b (break) Send a break to window.
C-a B (pow_break) Reopen the terminal line and send a break.
C-a c (screen) Create a new window and jump to it
C-a C (clear) Empty the contents of the current window, similar to clear
C-a d (detach) Peel Current Session
C-a D D (pow_detach) Peel off and exit the current terminal logout
C-a f (flow) Toggle flow on, off or auto.
C-a F (fit) Resize the window to the current region size.
C-a C-g (vbell) Toggles screen's visual bell mode.
C-a h (hardcopy) Write a hardcopy of the current window to the file "hardcopy.n".
C-a H (log) start/End recording current window content to file screenlog.n(n Expressed as num)
C-a i (info) Display information about the current window
C-a k (kill) Close the current window
C-a l (redisplay) Fully refresh current window.
C-a L (login) Toggle this windows login slot. Available only if screen is configured to update the utmp database.
C-a m (lastmsg) Repeat the last message displayed in the message line.
C-a M (monitor) Toggles monitoring of the current window.
C-a n (next) Jump to Next Window
C-a N (number) Show current window's num And name name
C-a p (prev) Jump to the previous window
C-a q (xon) Send a control-q to the current window.
C-a Q (only) Delete all regions but the current one. See also split, remove,focus.
C-a r (wrap) Toggle the current window's line-wrap setting (turn the current window's automatic margins on and off).
C-a s (xoff) Send a control-s to the current window.
C-a S (split) Split the current window horizontally
C-a t (time) Show system time and load
C-a v (version) Display the version and compilation date.
C-a C-v (digraph) Enter digraph.
C-a w (windows) Show all currently open windows,*Number indicates the current window
C-a W (width) Toggle 80/132 columns.
C-a x (lockscreen) Lock the terminal, unlock requires a password
C-a X (remove) Kill the current region. See also split, only, focus.
C-a z (suspend) Suspend screen. Your system must support BSD-style job-control.
C-a Z (reset) Reset the virtual terminal to its "power-on" values.
C-a . (dumptermcap) Write out a ".termcap" file.
C-a C-\ (quit) Kill all windows and terminate screen.
C-a : (colon) Enter command line mode.
C-a [perhaps esc (copy) Enter copy/scrollback mode.
C-a ] (paste .) Write the contents of the paste buffer to the stdin queue of the current window.
C-a {perhaps} (history) Copy and paste a previous (command) line.
C-a > (writebuf) Write paste buffer to a file.
C-a < (readbuf) Reads the screen-exchange file into the paste buffer.
C-a = (removebuf) Removes the file used by C-a < and C-a >.
C-a , (license) Shows where screen comes from, where it went to and why you can use it.
C-a _ (silence) Start/stop monitoring the current window for inactivity.
C-a | (split -v) Split the current region vertically into two new ones.
C-a * (displays) Show a listing of all currently attached displays.