在shell中，您可以执行重定向> <等操作，但是启动程序后如何呢？
>
<
这就是我问这个问题的方式，在我的终端后台运行的程序不断输出令人讨厌的文本。这是一个重要的过程，因此我必须打开另一个shell以避免输入文本。我希望能够进行>/dev/null重定向或其他重定向，以便可以继续在同一外壳中工作。
>/dev/null
除非关闭并重新打开您的tty（即注销并重新登录，这可能还会终止该过程中的某些后台进程），否则您只剩下一个选择：
例如：
$ tail -f /var/log/lastlog & [1] 5636 $ ls -l /proc/5636/fd total 0 lrwx------ 1 myuser myuser 64 Feb 27 07:36 0 -> /dev/pts/0 lrwx------ 1 myuser myuser 64 Feb 27 07:36 1 -> /dev/pts/0 lrwx------ 1 myuser myuser 64 Feb 27 07:36 2 -> /dev/pts/0 lr-x------ 1 myuser myuser 64 Feb 27 07:36 3 -> /var/log/lastlog $ gdb -p 5636 GNU gdb 6.8-debian Copyright (C) 2008 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Attaching to process 5636 Reading symbols from /usr/bin/tail...(no debugging symbols found)...done. Reading symbols from /lib/librt.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/librt.so.1 Reading symbols from /lib/libc.so.6...(no debugging symbols found)...done. Loaded symbols for /lib/libc.so.6 Reading symbols from /lib/libpthread.so.0...(no debugging symbols found)...done. [Thread debugging using libthread_db enabled] [New Thread 0x7f3c8f5a66e0 (LWP 5636)] Loaded symbols for /lib/libpthread.so.0 Reading symbols from /lib/ld-linux-x86-64.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/ld-linux-x86-64.so.2 (no debugging symbols found) 0x00007f3c8eec7b50 in nanosleep () from /lib/libc.so.6 (gdb) p dup2(open("/dev/null",0),1) [Switching to Thread 0x7f3c8f5a66e0 (LWP 5636)] $1 = 1 (gdb) p dup2(open("/dev/null",0),2) $2 = 2 (gdb) detach Detaching from program: /usr/bin/tail, process 5636 (gdb) quit $ ls -l /proc/5636/fd total 0 lrwx------ 1 myuser myuser 64 Feb 27 07:36 0 -> /dev/pts/0 lrwx------ 1 myuser myuser 64 Feb 27 07:36 1 -> /dev/null lrwx------ 1 myuser myuser 64 Feb 27 07:36 2 -> /dev/null lr-x------ 1 myuser myuser 64 Feb 27 07:36 3 -> /var/log/lastlog lr-x------ 1 myuser myuser 64 Feb 27 07:36 4 -> /dev/null lr-x------ 1 myuser myuser 64 Feb 27 07:36 5 -> /dev/null
您还可以考虑：
screen
nohup
