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add system and while

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While loop, keep checking a running process (e.g. perl) and start another new process (e.g. python) immetiately after it.
get pid
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onceupon 2017-10-26 18:29:14 +08:00 committed by GitHub
parent 1dece9ec82
commit 4b1d481eb8
1 changed files with 15 additions and 1 deletions
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@ -745,6 +745,13 @@ while read a b c; do echo $(($c-$b));done < <(head filename)
i=0; while read a b c; do ((i+=$c-$b)); echo $i; done < <(head filename)
```
##### While loop, keep checking a running process (e.g. perl) and start another new process (e.g. python) immetiately after it.
```bash
while [[ $(pidof perl) ]];do echo f;sleep 10;done && python timetorunpython.py
```
##### If loop
```bash
@ -2160,7 +2167,14 @@ telnet 192.168.2.106 53
```bash
ifconfig eth0 mtu 9000
```
##### get pid of a running process (e.g python)
```bash
pidof python
```
or
```bash
ps aux|grep python
```
=-=-=-=-=-A lot more coming!! =-=-=-=-=-=-=-=-=-=waitwait-=-=-=-=-=-=-=-=-=-