I was running apt upgrade, when I needed the terminal, so did a ctrlz. When I tried to restart it (fg), it would not restart, because it was no-longer in the jobs list (jobs). (I Did not, run disown). I then did a ps to get process id. It showed the process to be stopped (as expected), so I then did sudo kill -s SIGCONT pid, to re-start it, but nothing happened. ps showed that process was still stopped. There was no error message.
What I did.
sudo apt upgrade «wait a bit» «ctrl-z» «some other command» #can't remember, but nothing special. fg #This command failed, no such job jobs #No output What I tried to fix it.
- send sigcont to
apt send sigcont to
sudoWhat happened for the shell to disown the process?
- (more importantly) How do I re-start it?
Output from ps -l -p $(pgrep apt)
F S UID PID PPID C PRI NI ADDR SZ WCHAN TTY TIME CMD 4 T 0 22884 22883 0 80 0 - 21617 - pts/1 00:00:01 apt Output from pstree -s -p $(pgrep apt)
systemd(1)───kdeinit5(1038)───ksmserver(1062)───yakuake(1153)───bash(1225)───sudo(22883)───apt(22884) Output from pgrep bash | xargs -n1 ps -l -p
F S UID PID PPID C PRI NI ADDR SZ WCHAN TTY TIME CMD 0 S 1000 1225 1153 0 80 0 - 8770 core_s pts/1 00:00:00 bash F S UID PID PPID C PRI NI ADDR SZ WCHAN TTY TIME CMD 0 S 1000 3852 3849 0 80 0 - 8404 - pts/7 00:00:00 bash F S UID PID PPID C PRI NI ADDR SZ WCHAN TTY TIME CMD 0 S 1000 4449 4445 0 80 0 - 8392 core_s pts/3 00:00:01 bash ⋮ Ideas: has it lost contact with stdout/stdin?, does it need it?
System Debian, bash
#↳ bash --version GNU bash, version 4.3.30(1)-release (x86_64-pc-linux-gnu) #↳ uname -a Linux delorenzi 3.16.0-5-amd64 #1 SMP Debian 3.16.51-3+deb8u1 (2018-01-08) x86_64 GNU/Linux #↳ sudo --version Sudo version 1.8.10p3 Sudoers policy plugin version 1.8.10p3 Sudoers file grammar version 43 Sudoers I/O plugin version 1.8.10p3 
fgcommand in that shell session?ps -l -p $(pgrep apt-get)?apt-getprocess and which shell is the one runningfg.ps -l -p $(pgrep apt)to question.