目录

[TOC]

问题

在使用screen的时候，如果有大量屏幕滚动，则会造成上下查阅不便，解决办法是将screen输出的所有内容都写入日志中。

解决办法

先打开screen配置文件screenrc:

vim /etc/screenrc

在screenrc最后一行粘贴以下内容：

logfile /var/log/screenlog_%S.log

启动screen的时候要这样：

screen -SL sockname

然后在/var/log/下就会生成一个以screenlog开头的日志文件了

比较烦人的是，我这里screenlog_%S.log这个日志文件用vim查看会出现颜色代码，极为影响观感:

   5 root@instance-0647:/var/log# ll /var/lo^H^[[K^H^[[K^H^[[K^H^[[K^H^[[K^H^[[K^H^[[K^H^[[K^H^[[K^H^[[K^Gll
   6 total 60316
   7 drwxrwxr-x   9 root        syslog               4096 Feb 16 14:42 ^[[0m^[[01;34m.^[[0m/
   8 drwxr-xr-x  13 root        root                 4096 Apr 20  2022 ^[[01;34m..^[[0m/

没办法，查看这个日志文件的时候就用tail吧，不会出现乱码。

P.S.网上有人用的是logfile /var/log/screenlog_%t.log，这种方式方式比较麻烦，使用时还要多传一个参数，如screen -S sockname -t titlename -L，比较麻烦。

附screen说明

Use: screen [-opts] [cmd [args]]
 or: screen -r [host.tty]

Options:
-4            Resolve hostnames only to IPv4 addresses.
-6            Resolve hostnames only to IPv6 addresses.
-a            Force all capabilities into each window's termcap.
-A -[r|R]     Adapt all windows to the new display width & height.
-c file       Read configuration file instead of '.screenrc'.
-d (-r)       Detach the elsewhere running screen (and reattach here).
-dmS name     Start as daemon: Screen session in detached mode.
-D (-r)       Detach and logout remote (and reattach here).
-D -RR        Do whatever is needed to get a screen session.
-e xy         Change command characters.
-f            Flow control on, -fn = off, -fa = auto.
-h lines      Set the size of the scrollback history buffer.
-i            Interrupt output sooner when flow control is on.
-l            Login mode on (update /var/run/utmp), -ln = off.
-ls [match]   or
-list         Do nothing, just list our SockDir [on possible matches].
-L            Turn on output logging.
-Logfile file Set logfile name.
-m            ignore $STY variable, do create a new screen session.
-O            Choose optimal output rather than exact vt100 emulation.
-p window     Preselect the named window if it exists.
-q            Quiet startup. Exits with non-zero return code if unsuccessful.
-Q            Commands will send the response to the stdout of the querying process.
-r [session]  Reattach to a detached screen process.
-R            Reattach if possible, otherwise start a new session.
-s shell      Shell to execute rather than $SHELL.
-S sockname   Name this session <pid>.sockname instead of <pid>.<tty>.<host>.
-t title      Set title. (window's name).
-T term       Use term as $TERM for windows, rather than "screen".
-U            Tell screen to use UTF-8 encoding.
-v            Print "Screen version 4.08.00 (GNU) 05-Feb-20".
-wipe [match] Do nothing, just clean up SockDir [on possible matches].
-x            Attach to a not detached screen. (Multi display mode).
-X            Execute <cmd> as a screen command in the specified session.