I am working on a remote server equipped with CentOS from the local computer,
I'd like it to run the following codes:
nohup python3 search_large_files.py &
However, it did not worked as I expected
[root@iz2ze9wve43n2nyuvmsfx5z ~]# ps ax| grep nohup
29360 pts/1 R+ 0:00 grep --color=auto nohup
How could I utilize nohup to run my python codes so I can power off and go sleeping while the server is working.
nohup removes itself from the name of the process running. You can't find it with ps ax| grep nohup for this reason.
Check this test.py file I made:
import sys
import time
while True:
time.sleep(0.5)
sys.stdout.write('ok\n')
sys.stdout.flush()
Running it:
nosklo@stackoverflow:~$ python3 test.py
ok
ok
^CTraceback (most recent call last):
File "test.py", line 4, in <module>
time.sleep(0.5)
KeyboardInterrupt
Now with nohup:
nosklo@stackoverflow:~$ nohup python3 test.py > foo.txt &
nohup: ignoring input and redirecting stderr to stdout
[1] 12453
nosklo@stackoverflow:~$ ps ax | grep -i nohup
nosklo 12548 0.0 0.0 15976 944 pts/17 S+ 14:14 0:00 grep --color=auto -i nohup
nosklo@stackoverflow:~$ ps ax | grep -i python
nosklo 12453 0.0 0.0 31400 5660 pts/17 S 14:13 0:00 python3 test.py
nosklo 12528 0.0 0.0 15976 940 pts/17 S+ 14:14 0:00 grep --color=auto -i python
As you can see it is there, with pid 12453 but without nohup in the name.
nosklo@stackoverflow:~$ kill %1
[1]+ Terminated nohup python3 test.py > foo.txt
nosklo@stackoverflow:~$ tail foo.txt
ok
ok
ok
....
And it was working this whole time.
