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.
I am trying to submit background jobs using the nohup command on a client system where my session is running under a "master shell" (BASH). If I try to nohup the actual job (ie: nohup MYJOB.BAT > MYJOB.LOG 2>&1 &) the command will fail with a return code of 126 and a "permission denied" message.... (0 Replies)
While executing a ksh file with a input parameter in background like the following
bash-2.03$nohup fil.ksh 4 &
the nohup session is stopped.
The same ksh file while executed like
bash-2.03$fil.ksh 4
works fine.
I am trying the above in Solaris 5.8 in bash shell. Please let me... (2 Replies)
Hello folks,
I have got a script which telnets to different boxes and runs a certain script with 3 run time args.
The line from the script which does it is:
(sleep 1; echo $USERID ; sleep 1; echo $PASSWD ; sleep 1 ; echo y ; sleep 1 ; echo "\r" ; sleep 1 ; echo "cd $FILEPATH" ; sleep 1 ; sleep 1... (1 Reply)
ok... want to start off by saying i am sorry for the ignorance... still trying to figure out the diffs between solaris and aix... and i think that is where i am running into problems... :o
SITTIATION:
we are doing an implementation for Oracle's CC&B... we recently switched from... (1 Reply)
Hi,
I am kinda confused with this, am not sure what is happening
i have a script say test.sh
----------
cat myfile | while read line
do
exit 2
done
echo "out of loop"
-----------
as it is evident, the exit should cause the script to terminate ,hence producing no output for the... (1 Reply)
Hello
I am running this script inst.sh
#!/bin/ksh
sqlplus -s username/password @temp.sql
----Here is my temp.sql
set serveroutput on
select instance_name from V$instance;
exit
When i run the script inst.sh on the command prompt...it runs fine...but
when i run it using... (5 Replies)
There is a daemon which is constantly writing to this particular nohup.out file.This daemon can't be stopped. But the large size of this file is hampering the directory space.I want to write a script which will wait for 48 hours and then delete the contents of the file ( nohup.out ), but not the... (1 Reply)
Hi, but it is possible to effect a sftp in???
thanks thousand
Germanico
---------- Post updated at 07:01 AM ---------- Previous update was at 05:51 AM ----------
Hi, but it is possible to effect a sftp in nohup mode??? (2 Replies)
Hi All
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 &
5611
/home/brad > /usr/bin/nohup: appending output to `nohup.out'
+ Stopped (SIGTTOU) ... (9 Replies)
Hi
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)