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Getting out of while loop on console

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2

I ran a command:

while true ; do ..... ....... ; done

on the Linux console/terminal, and now this while loop is continuously running.

I have two questions here:

1. How to get out of this while loop?


2. If my PuTTY session to Linux gets disconnected, how can I go back and find this loop and kill it?

shell command-line terminal

share|improve this question

edited yesterday

G-Man

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asked yesterday

VikasBVikasB

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2

I ran a command:

while true ; do ..... ....... ; done

on the Linux console/terminal, and now this while loop is continuously running.

I have two questions here:

1. How to get out of this while loop?


2. If my PuTTY session to Linux gets disconnected, how can I go back and find this loop and kill it?

shell command-line terminal

share|improve this question

edited yesterday

G-Man

13.9k93870

asked yesterday

VikasBVikasB

111

New contributor

VikasB is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

I ran a command:

while true ; do ..... ....... ; done

on the Linux console/terminal, and now this while loop is continuously running.

I have two questions here:

1. How to get out of this while loop?


2. If my PuTTY session to Linux gets disconnected, how can I go back and find this loop and kill it?

shell command-line terminal

share|improve this question

edited yesterday

G-Man

13.9k93870

asked yesterday

VikasBVikasB

111

New contributor

VikasB is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

while true ; do ..... ....... ; done

share|improve this question

edited yesterday

G-Man

13.9k93870

asked yesterday

VikasBVikasB

111

New contributor

VikasB is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

edited yesterday

G-Man

13.9k93870

asked yesterday

VikasBVikasB

111

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VikasB is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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edited yesterday

G-Man

13.9k93870

edited yesterday

G-Man

13.9k93870

asked yesterday

VikasBVikasB

111

New contributor

VikasB is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked yesterday

VikasBVikasB

111

2 Answers
2

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3

You can cancel the loop with: CTRL + C

Your session would have ended when your putty session closed so the loop will no longer be running

• unless it was running in a screen session or similar in which case you would have to reattach it using the method of that particular program.

share|improve this answer

edited yesterday

terdon♦

134k33270450

answered yesterday

Jesse_bJesse_b

14.5k33574

add a comment | 

0

Sometimes hitting control-c doesn't work: the loop body gets the control-c and the loop keeps iterating. (Although I can't reproduce this behaviour right now with sleep 1 as the loop condition or the body, I remember seeing it.)

control-z can stop this, and the loop won't resume after fg unless the loop was inside a subshell like (while true;do : ;done). (With bash on GNU/Linux).

Or control-z / fg is useful if you want the currently-running iteration of the loop to finish cleanly, but not start another iteration.

(Control-z stops a job, getting the kernel to deliver SIGTSTP exactly like how control-c delivers SIGINT, on a TTY that's not in raw mode. The default action for this signal is to stop the job. fg and bg are job-control commands, see the bash built-in "help" for them and the jobs command.)

share|improve this answer

answered yesterday

Peter CordesPeter Cordes

4,5731434

add a comment | 

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3

You can cancel the loop with: CTRL + C

Your session would have ended when your putty session closed so the loop will no longer be running

• unless it was running in a screen session or similar in which case you would have to reattach it using the method of that particular program.

share|improve this answer

edited yesterday

terdon♦

134k33270450

answered yesterday

Jesse_bJesse_b

14.5k33574

add a comment | 

3

You can cancel the loop with: CTRL + C

Your session would have ended when your putty session closed so the loop will no longer be running

• unless it was running in a screen session or similar in which case you would have to reattach it using the method of that particular program.

share|improve this answer

edited yesterday

terdon♦

134k33270450

answered yesterday

Jesse_bJesse_b

14.5k33574

add a comment | 

You can cancel the loop with: CTRL + C

Your session would have ended when your putty session closed so the loop will no longer be running

• unless it was running in a screen session or similar in which case you would have to reattach it using the method of that particular program.

share|improve this answer

edited yesterday

terdon♦

134k33270450

answered yesterday

Jesse_bJesse_b

14.5k33574

share|improve this answer

edited yesterday

terdon♦

134k33270450

answered yesterday

Jesse_bJesse_b

14.5k33574

edited yesterday

terdon♦

134k33270450

edited yesterday

terdon♦

134k33270450

answered yesterday

Jesse_bJesse_b

14.5k33574

answered yesterday

Jesse_bJesse_b

14.5k33574

0

Sometimes hitting control-c doesn't work: the loop body gets the control-c and the loop keeps iterating. (Although I can't reproduce this behaviour right now with sleep 1 as the loop condition or the body, I remember seeing it.)

control-z can stop this, and the loop won't resume after fg unless the loop was inside a subshell like (while true;do : ;done). (With bash on GNU/Linux).

Or control-z / fg is useful if you want the currently-running iteration of the loop to finish cleanly, but not start another iteration.

(Control-z stops a job, getting the kernel to deliver SIGTSTP exactly like how control-c delivers SIGINT, on a TTY that's not in raw mode. The default action for this signal is to stop the job. fg and bg are job-control commands, see the bash built-in "help" for them and the jobs command.)

share|improve this answer

answered yesterday

Peter CordesPeter Cordes

4,5731434

add a comment | 

0

Sometimes hitting control-c doesn't work: the loop body gets the control-c and the loop keeps iterating. (Although I can't reproduce this behaviour right now with sleep 1 as the loop condition or the body, I remember seeing it.)

control-z can stop this, and the loop won't resume after fg unless the loop was inside a subshell like (while true;do : ;done). (With bash on GNU/Linux).

Or control-z / fg is useful if you want the currently-running iteration of the loop to finish cleanly, but not start another iteration.

(Control-z stops a job, getting the kernel to deliver SIGTSTP exactly like how control-c delivers SIGINT, on a TTY that's not in raw mode. The default action for this signal is to stop the job. fg and bg are job-control commands, see the bash built-in "help" for them and the jobs command.)

share|improve this answer

answered yesterday

Peter CordesPeter Cordes

4,5731434

add a comment | 

Sometimes hitting control-c doesn't work: the loop body gets the control-c and the loop keeps iterating. (Although I can't reproduce this behaviour right now with sleep 1 as the loop condition or the body, I remember seeing it.)

control-z can stop this, and the loop won't resume after fg unless the loop was inside a subshell like (while true;do : ;done). (With bash on GNU/Linux).

Or control-z / fg is useful if you want the currently-running iteration of the loop to finish cleanly, but not start another iteration.

(Control-z stops a job, getting the kernel to deliver SIGTSTP exactly like how control-c delivers SIGINT, on a TTY that's not in raw mode. The default action for this signal is to stop the job. fg and bg are job-control commands, see the bash built-in "help" for them and the jobs command.)

share|improve this answer

answered yesterday

Peter CordesPeter Cordes

4,5731434

share|improve this answer

answered yesterday

Peter CordesPeter Cordes

4,5731434

answered yesterday

Peter CordesPeter Cordes

4,5731434

answered yesterday

Peter CordesPeter Cordes

4,5731434