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Executing bash scripts simultaneously

A script's background process is still alive after closing the terminalscreenrc subshell for every windowRun multiple commands and kill them as one in bashRun commands in a terminal, then let me type more commandsHow do i write a script to run only if another script has run more recently?Synchronous processes in the backgroundRun all scripts in a folder in backgroundHow to troubleshoot failing cron jobIn bash, how can I export/set a global variable from a read funtion inside a script, for use in a second script and a config file later on?Bash run multiple Python scripts with pre-imported modules

1

1

I run several bash scripts in separate terminal windows (tabs). I want to mix them to run in the same window and provide mix outputs. I just need to initiate all scripts independently in the same window.

The common solution is to use & as

./script1 &
./script2 &
./script3

BUT I don't want to send the scripts to work in the background since I do not have control over them in the terminal. For example, I cannot terminate this script by Ctrl+C, as the background processes will not be killed by Ctrl+C.

bash shell-script

share|improve this question

asked Mar 1 at 20:33

GooglebotGooglebot

509623

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  I think you need to read LESS='+/^JOB CONTROL' man bash. In particular, you can run the jobs builtin to see a list of current jobs, and can kill them using jobspecs such as kill %2 and so forth.
  
  – Wildcard
  Mar 1 at 20:39
  
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Would something like GNU parallel be useful?
  
  – kemotep
  Mar 1 at 20:42
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Read up on the pkill man page: that will make it easier to send an INT signal to the right process.
  
  – glenn jackman
  Mar 1 at 20:48
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  If you run all three and press ctrl+c which one do you want to end?
  
  – Jesse_b
  Mar 1 at 21:15
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Jesse_b I want to end all, like it is a single script.
  
  – Googlebot
  Mar 1 at 21:46
  

  
  
  
  

add a comment | 

1

1

I run several bash scripts in separate terminal windows (tabs). I want to mix them to run in the same window and provide mix outputs. I just need to initiate all scripts independently in the same window.

The common solution is to use & as

./script1 &
./script2 &
./script3

BUT I don't want to send the scripts to work in the background since I do not have control over them in the terminal. For example, I cannot terminate this script by Ctrl+C, as the background processes will not be killed by Ctrl+C.

bash shell-script

share|improve this question

asked Mar 1 at 20:33

GooglebotGooglebot

509623

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  I think you need to read LESS='+/^JOB CONTROL' man bash. In particular, you can run the jobs builtin to see a list of current jobs, and can kill them using jobspecs such as kill %2 and so forth.
  
  – Wildcard
  Mar 1 at 20:39
  
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Would something like GNU parallel be useful?
  
  – kemotep
  Mar 1 at 20:42
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Read up on the pkill man page: that will make it easier to send an INT signal to the right process.
  
  – glenn jackman
  Mar 1 at 20:48
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  If you run all three and press ctrl+c which one do you want to end?
  
  – Jesse_b
  Mar 1 at 21:15
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Jesse_b I want to end all, like it is a single script.
  
  – Googlebot
  Mar 1 at 21:46
  

  
  
  
  

add a comment | 

I run several bash scripts in separate terminal windows (tabs). I want to mix them to run in the same window and provide mix outputs. I just need to initiate all scripts independently in the same window.

The common solution is to use & as

./script1 &
./script2 &
./script3

BUT I don't want to send the scripts to work in the background since I do not have control over them in the terminal. For example, I cannot terminate this script by Ctrl+C, as the background processes will not be killed by Ctrl+C.

bash shell-script

share|improve this question

asked Mar 1 at 20:33

GooglebotGooglebot

509623

./script1 &
./script2 &
./script3

share|improve this question

asked Mar 1 at 20:33

GooglebotGooglebot

509623

share|improve this question

asked Mar 1 at 20:33

GooglebotGooglebot

509623

asked Mar 1 at 20:33

GooglebotGooglebot

509623

asked Mar 1 at 20:33

GooglebotGooglebot

509623

3 Answers
3

active

oldest

votes

5

You can run your scripts in tmux or screen in almost any number of background processes. Those processes can be accessed in any time you want.

See tmux or GNU screen

share|improve this answer

answered Mar 1 at 20:41

nestor11nestor11

511

add a comment | 

3

You could write a wrapper script around them that sends them all to the background and then traps ctrl+c:

#!/bin/bash

trap ctrl_c INT

scripts=( ./script1.sh ./script2.sh ./script3.sh )

ctrl_c () 
 printf 'Found [%i] PIDs runningn' "$#pids[@]"
 for pid in "$pids[@]"; do
 printf 'Killing PID: %in' "$pid"
 kill "$pid"
 done


for script in "$scripts[@]"; do
 "$script" &
 pids+=($!)
done

for pid in "$pids[@]"; do
 wait "$pid"
done

---

So if you press ctrl+c it will kill all the pids that have been previously captured:

$ cat ./script1..3.sh
#!/bin/bash

sleep 30; echo foo
#!/bin/bash

sleep 30; echo bar
#!/bin/bash

sleep 30; echo baz

$ ./script4.sh
^CFound [3] PIDs running
Killing PID: 48971
Killing PID: 48972
Killing PID: 48973
./script4.sh: line 21: 48971 Terminated: 15 "$script"
./script4.sh: line 21: 48972 Terminated: 15 "$script"
./script4.sh: line 21: 48973 Terminated: 15 "$script"

share|improve this answer

answered Mar 1 at 23:10

Jesse_bJesse_b

13.3k23369

add a comment | 

0

Try:

parallel -j0 --line-buffer ::: ./script1 ./script2 ./script3

share|improve this answer

answered 2 hours ago

Ole TangeOle Tange

12.7k1455105

add a comment | 

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5

You can run your scripts in tmux or screen in almost any number of background processes. Those processes can be accessed in any time you want.

See tmux or GNU screen

share|improve this answer

answered Mar 1 at 20:41

nestor11nestor11

511

add a comment | 

5

You can run your scripts in tmux or screen in almost any number of background processes. Those processes can be accessed in any time you want.

See tmux or GNU screen

share|improve this answer

answered Mar 1 at 20:41

nestor11nestor11

511

add a comment | 

You can run your scripts in tmux or screen in almost any number of background processes. Those processes can be accessed in any time you want.

See tmux or GNU screen

share|improve this answer

answered Mar 1 at 20:41

nestor11nestor11

511

share|improve this answer

answered Mar 1 at 20:41

nestor11nestor11

511

answered Mar 1 at 20:41

nestor11nestor11

511

answered Mar 1 at 20:41

nestor11nestor11

511

3

You could write a wrapper script around them that sends them all to the background and then traps ctrl+c:

#!/bin/bash

trap ctrl_c INT

scripts=( ./script1.sh ./script2.sh ./script3.sh )

ctrl_c () 
 printf 'Found [%i] PIDs runningn' "$#pids[@]"
 for pid in "$pids[@]"; do
 printf 'Killing PID: %in' "$pid"
 kill "$pid"
 done


for script in "$scripts[@]"; do
 "$script" &
 pids+=($!)
done

for pid in "$pids[@]"; do
 wait "$pid"
done

---

So if you press ctrl+c it will kill all the pids that have been previously captured:

$ cat ./script1..3.sh
#!/bin/bash

sleep 30; echo foo
#!/bin/bash

sleep 30; echo bar
#!/bin/bash

sleep 30; echo baz

$ ./script4.sh
^CFound [3] PIDs running
Killing PID: 48971
Killing PID: 48972
Killing PID: 48973
./script4.sh: line 21: 48971 Terminated: 15 "$script"
./script4.sh: line 21: 48972 Terminated: 15 "$script"
./script4.sh: line 21: 48973 Terminated: 15 "$script"

share|improve this answer

answered Mar 1 at 23:10

Jesse_bJesse_b

13.3k23369

add a comment | 

3

You could write a wrapper script around them that sends them all to the background and then traps ctrl+c:

#!/bin/bash

trap ctrl_c INT

scripts=( ./script1.sh ./script2.sh ./script3.sh )

ctrl_c () 
 printf 'Found [%i] PIDs runningn' "$#pids[@]"
 for pid in "$pids[@]"; do
 printf 'Killing PID: %in' "$pid"
 kill "$pid"
 done


for script in "$scripts[@]"; do
 "$script" &
 pids+=($!)
done

for pid in "$pids[@]"; do
 wait "$pid"
done

---

So if you press ctrl+c it will kill all the pids that have been previously captured:

$ cat ./script1..3.sh
#!/bin/bash

sleep 30; echo foo
#!/bin/bash

sleep 30; echo bar
#!/bin/bash

sleep 30; echo baz

$ ./script4.sh
^CFound [3] PIDs running
Killing PID: 48971
Killing PID: 48972
Killing PID: 48973
./script4.sh: line 21: 48971 Terminated: 15 "$script"
./script4.sh: line 21: 48972 Terminated: 15 "$script"
./script4.sh: line 21: 48973 Terminated: 15 "$script"

share|improve this answer

answered Mar 1 at 23:10

Jesse_bJesse_b

13.3k23369

add a comment | 

You could write a wrapper script around them that sends them all to the background and then traps ctrl+c:

#!/bin/bash

trap ctrl_c INT

scripts=( ./script1.sh ./script2.sh ./script3.sh )

ctrl_c () 
 printf 'Found [%i] PIDs runningn' "$#pids[@]"
 for pid in "$pids[@]"; do
 printf 'Killing PID: %in' "$pid"
 kill "$pid"
 done


for script in "$scripts[@]"; do
 "$script" &
 pids+=($!)
done

for pid in "$pids[@]"; do
 wait "$pid"
done

---

So if you press ctrl+c it will kill all the pids that have been previously captured:

$ cat ./script1..3.sh
#!/bin/bash

sleep 30; echo foo
#!/bin/bash

sleep 30; echo bar
#!/bin/bash

sleep 30; echo baz

$ ./script4.sh
^CFound [3] PIDs running
Killing PID: 48971
Killing PID: 48972
Killing PID: 48973
./script4.sh: line 21: 48971 Terminated: 15 "$script"
./script4.sh: line 21: 48972 Terminated: 15 "$script"
./script4.sh: line 21: 48973 Terminated: 15 "$script"

share|improve this answer

answered Mar 1 at 23:10

Jesse_bJesse_b

13.3k23369

#!/bin/bash

trap ctrl_c INT

scripts=( ./script1.sh ./script2.sh ./script3.sh )

ctrl_c () 
 printf 'Found [%i] PIDs runningn' "$#pids[@]"
 for pid in "$pids[@]"; do
 printf 'Killing PID: %in' "$pid"
 kill "$pid"
 done


for script in "$scripts[@]"; do
 "$script" &
 pids+=($!)
done

for pid in "$pids[@]"; do
 wait "$pid"
done

$ cat ./script1..3.sh
#!/bin/bash

sleep 30; echo foo
#!/bin/bash

sleep 30; echo bar
#!/bin/bash

sleep 30; echo baz

$ ./script4.sh
^CFound [3] PIDs running
Killing PID: 48971
Killing PID: 48972
Killing PID: 48973
./script4.sh: line 21: 48971 Terminated: 15 "$script"
./script4.sh: line 21: 48972 Terminated: 15 "$script"
./script4.sh: line 21: 48973 Terminated: 15 "$script"

share|improve this answer

answered Mar 1 at 23:10

Jesse_bJesse_b

13.3k23369

answered Mar 1 at 23:10

Jesse_bJesse_b

13.3k23369

answered Mar 1 at 23:10

Jesse_bJesse_b

13.3k23369

0

Try:

parallel -j0 --line-buffer ::: ./script1 ./script2 ./script3

share|improve this answer

answered 2 hours ago

Ole TangeOle Tange

12.7k1455105

add a comment | 

0

Try:

parallel -j0 --line-buffer ::: ./script1 ./script2 ./script3

share|improve this answer

answered 2 hours ago

Ole TangeOle Tange

12.7k1455105

add a comment | 

Try:

parallel -j0 --line-buffer ::: ./script1 ./script2 ./script3

share|improve this answer

answered 2 hours ago

Ole TangeOle Tange

12.7k1455105

parallel -j0 --line-buffer ::: ./script1 ./script2 ./script3

share|improve this answer

answered 2 hours ago

Ole TangeOle Tange

12.7k1455105

answered 2 hours ago

Ole TangeOle Tange

12.7k1455105

answered 2 hours ago

Ole TangeOle Tange

12.7k1455105