linux kill background task

Question

How do I kill the last spawned background task in linux   Example   doSomething doAnotherThing doB  amp  doC doD  kill doB

User · Accepted Answer

There s a special variable for this in bash   kill         expands to the PID of the last process executed in the background

User · Answer

This should kill all background processes   jobs -p   xargs kill -9

User · Answer

Just use the killall command   killall taskname  for more info and more advanced options  type  man killall

User · Answer

skill doB   skill is a version of the kill command that lets you select one or multiple processes based on a given criteria

User · Answer

this is an out of topic answer  but  for those who are interested  it maybe valuable   As in  John Kugelman s answer    is related to job specification  how to efficiently find that  use less s  amp pattern command  seems man use less pager  not that sure   in man bash type  amp   then type Enter will only show lines that containing      to reshow all  type  amp   then Enter

User · Answer

The following command gives you a list of all background processes in your session  along with the pid  You can then use it to kill the process   jobs -l   Example usage     sleep 300  amp    jobs -l  1   31139 Running                 sleep 300  amp    kill 31139

User · Answer

You need its pid    use  ps -A  to find it

User · Answer

You can kill by job number  When you put a task in the background you ll see something like       script  amp   1  35341   That  1  is the job number and can be referenced like     kill  1   kill       Most recent background job   To see a list of job numbers use the jobs command  More from man bash      There are a number of ways to refer to a job in the shell   The character   introduces a job name   Job number n may  be          referred  to  as  n   A job may also be referred to using a prefix of the name used to start it  or using a substring that          appears in its command line   For example   ce refers to a stopped ce job   If a prefix matches more than  one  job   bash          reports  an error   Using   ce  on the other hand  refers to any job containing the string ce in its command line   If the          substring matches more than one job  bash reports an error   The symbols    and    refer to the shell s notion of the current job  which is the last job stopped while it was in the foreground or started in the background   The previous job may          be referenced using  -   In output pertaining to jobs  e g   the output of the jobs command   the current  job  is  always          flagged  with  a    and the previous job with a -   A single    with no accompanying job specification  also refers to the          current job

[linux] linux: kill background task

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