I am trying to execute following code:
Whenever it tries to execute nohup command it hangs because of the following prompt in output.
I tried to suppress nohup output using 2>/dev/null but still its not working.
First and foremost, if you did get all three of these pipe chains writing to output.alarms independently, they wouldn't know or care about each other -- they'd just write whatever they want, wherever they want, whenever they want, potentially overwriting each others' contents. You should have a separate logfile for each tail.
Second of all, 'tail' and 'awk' are separate processes. The warning message is coming from the standard error of tail, and you're only redirecting awk.
Third of all, you're only putting awk in the background, not tail, which is why tail hangs -- not because of nohup.
Fourth, it makes no sense to use nohup at the start of a pipe chain, because it does what it says it's doing -- sends its stdout into nohup.out and not into the pipe feeding into awk.
You can achieve a similar effect to nohup by redirecting all streams to /dev/null, which will work for the entire pipe chain. You can also put an entire subshell in the background with ( ) .
The 'disown' is so the script won't wait for the background jobs to finish before it quits. Some shells don't have disown, but those wouldn't wait for background jobs anyway.
Hmm, try this:
trap "" HUP works to prevent child processes dying with SIGHUP in my shell. Any more complex trap won't work, since child processes can't inherit actual shell code from the shell, just SIG_IGN.
I need to execute about 1000 scp commands sequential , so I made "scp.sh" - like this
scp - rp ...
scp - rp ...
scp - rp ...
then I run
nohup sh scp.sh &The problem is: nohup process stopped when I closed session, or when the session expired,... Something wrong :(:(:(
... (4 Replies)
I am struggling to get a process to run in the background on a Ubuntu Linux machine. I run: -
/home/brad > /usr/bin/nohup sudo /home/brad/spideroak/jsystem/runner/runAgent < /dev/null &
/home/brad > /usr/bin/nohup: appending output to `nohup.out'
+ Stopped (SIGTTOU) ... (9 Replies)
Hi, but it is possible to effect a sftp in???
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Hi, but it is possible to effect a sftp in nohup mode??? (2 Replies)
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I am running this script inst.sh
sqlplus -s username/password @temp.sql
----Here is my temp.sql
set serveroutput on
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I am kinda confused with this, am not sure what is happening
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While executing a ksh file with a input parameter in background like the following
bash-2.03$nohup fil.ksh 4 &
the nohup session is stopped.
The same ksh file while executed like
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