[SOLVED] Command execution order

mahendra singh · 08-17-2013, 10:54 AM

Appreciate for the fast reply

Dear Friends,

I have a script which has 2 commands in it.
Command 1 takes long time to do its job.

ex:

vi t.ksh

#bin/bash
grep "m" *.txt ---command 1
grep "t" *.ksh ---command 2

Is there a way that i don't wait the completion of command 1 in script and script proceed with next execution of command.?

Regads,
Mahendra Singh

eSelix · 08-17-2013, 11:20 AM

Yes, append at end of command "&". It will send this process to background.

Code:

#!/bin/bash
grep "m" *.txt &
grep "t" *.ksh

mahendra singh · 08-17-2013, 11:31 AM

Quote:

Originally Posted by eSelix

Yes, append at end of command "&". It will send this process to background.

Code:

#!/bin/bash
grep "m" *.txt &
grep "t" *.ksh

I did but its still throwing the output on console for first command?

schneidz · 08-17-2013, 11:52 AM

Quote:

Originally Posted by mahendra singh

I did but its still throwing the output on console for first command?

the obvious question is: would redirecting the output to a file help ?

eSelix · 08-17-2013, 02:41 PM

And what you want to do with the output of first command?

reza_zah1991 · 08-17-2013, 04:11 PM

Code:

reza@reza-HP-1000:~$ cat /etc/passwd |grep 'root' &>file &
[1] 5636
reza@reza-HP-1000:~$ cat file 
root:x:0:0:root:/root:/bin/bash
[1]+  Done                    cat /etc/passwd | grep --color=auto 'root' &>file

with >&file you send the stdout & stderr to a file

and with the & at the end of the line you send the process to the background

if you have problem with lastLine,,youcan read the file & delete the last line with sed command

mahendra singh · 08-18-2013, 09:35 AM

Hi All,

Yes issue got resolved, I have put the first process or command background(&) and the next command got executed.

Thank you