Started copying rsync files. Then he made Ctrl + Z, bg, disown and closed the terminal. Is it possible to somehow send the output of this already running process to a file without stopping the process itself? I know how to do this at startup, but if the process is already running.

  • one
    here there seems to be an answer + you can look at this utility - BOPOH
  • Try nohup command> file 2> & 1 - Valery Krasnoselsky

2 answers 2

I really like to use screen . The log is written to a file and you can return to the application.

  1. screen ;
  2. Run rsync ;
  3. Ctrl + A + D - detach;
  4. screen -ls - view the list of running screen;
  5. screen -r - resume;
  • The question was about something else. The correct answer was given in his comment @BOPOH - avp

This can be done only if you connect to the process via gdb and execute:

  • p dup2 (open ("/ dev / null", 0), 1) # STDOUT
  • p dup2 (open ("/ dev / null", 0), 2) # STDERR
  • to disconnect
  • go out

For example:

 $ 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("/путь/до/файла",0),1) [Switching to Thread 0x7f3c8f5a66e0 (LWP 5636)] $1 = 1 (gdb) p dup2(open("/путь/до/файла",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