bash + how to hold shell scripts

Question

Is it possible to hold/stop the bash script progress without to kill the process? ( by kill command ) or other command

For example this script - install_linux_pkgs.bash , will install Linux pkgs step by step

    ./install_linux_pkgs.bash

What I want is to stop ( HOLD / HANG ) the script progress externally but not to kill it

kill -l
1) SIGHUP       2) SIGINT       3) SIGQUIT      4) SIGILL
5) SIGTRAP      6) SIGABRT      7) SIGBUS       8) SIGFPE
9) SIGKILL     10) SIGUSR1     11) SIGSEGV     12) SIGUSR2
13) SIGPIPE     14) SIGALRM     15) SIGTERM     16) SIGSTKFLT
17) SIGCHLD     18) SIGCONT     19) SIGSTOP     20) SIGTSTP
21) SIGTTIN     22) SIGTTOU     23) SIGURG      24) SIGXCPU
25) SIGXFSZ     26) SIGVTALRM   27) SIGPROF     28) SIGWINCH
29) SIGIO       30) SIGPWR      31) SIGSYS      34) SIGRTMIN
35) SIGRTMIN+1  36) SIGRTMIN+2  37) SIGRTMIN+3  38) SIGRTMIN+4
39) SIGRTMIN+5  40) SIGRTMIN+6  41) SIGRTMIN+7  42) SIGRTMIN+8
43) SIGRTMIN+9  44) SIGRTMIN+10 45) SIGRTMIN+11 46) SIGRTMIN+12
47) SIGRTMIN+13 48) SIGRTMIN+14 49) SIGRTMIN+15 50) SIGRTMAX-14
51) SIGRTMAX-13 52) SIGRTMAX-12 53) SIGRTMAX-11 54) SIGRTMAX-10
55) SIGRTMAX-9  56) SIGRTMAX-8  57) SIGRTMAX-7  58) SIGRTMAX-6
59) SIGRTMAX-5  60) SIGRTMAX-4  61) SIGRTMAX-3  62) SIGRTMAX-2
63) SIGRTMAX-1  64) SIGRTMAX

Answer 1

You can stop the process with ctrl-z. Then do whatever you want in the terminal. To continue the process use fg.

Or from another terminal, use:

kill -19 <pid>

It sends SIGSTOP (signal number 19) to the process. This is not possible to catch for the process. To continue the process use:

kill -18 <pid>

This time it's SIGCONT that brings the process back in a running/sleeping state.

Answer 2

I think you should be able to hit Ctrl+Z and it'll suspend the process. When you're ready to come back to it, just use fg command and your process will come back to life in the foreground. Or, you could issue a bg command and it'll resurrect your program in background (equivalent to /some/program &)