What if the command takes hours? What if, during those hours, you have an internet service outage, causing the connection to break and the command to be killed? What if its generating tons of log spamming or something? There's good reasons to want to background the remote process instead of the local ssh connection.
What shell is being used here? If you're using bash, you might want to add a 'disown' command after the &.
Hi,
I have a general question on using the "nohup" command. As far as I've got it, submmitting a job with no hang up specified, should result in the job running until completion, regardless of whether the session that submitted the job(parent) is still active. This is very helpful when doing... (1 Reply)
Hello All,
I am newbie to unix.I am trying to use NOHUP command in shell script it works fine with only "nohup test.sh 10 &" and "/opt/user/nohup test.sh 10 &" gives an error saying "ksh: /opt/user/nohup : not found".
Can anybody please guide me to make it work.
Thanks
Blazix (9 Replies)
Hi
I am using nohup command in script(say nohup ls- ltr > somefile 2>&1 & ). I dont want any kind of output to be displayed on screen. When i tried the above nohup it still gives me some out put on screen like
2991
Done >somefile 2>&1
Please you let me know what is... (3 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 $FILEPATH" ; sleep 1 ; sleep 1... (1 Reply)
I want to know how to use a nohup command in the script........
I have to run following command
nohup /tmp/app/statuscheck.sh &
After typing this command I will type ctrl D to come to the prompt and the that command will run in backround.
I want to include that command in a... (2 Replies)
I want to know how to use a nohup command in the script........
I have to run following command
nohup /tmp/app/statuscheck.sh &
After typing this command I will type ctrl D to come to the prompt and the that command will run in backround.
Even after pressing & the command is not... (3 Replies)
I'm trying to run a compress script in the background, but I even though the script is running in the background I get "Sending nohup output to nohup.out." and the screen just stays there. How can I make the script run in background and make my command prompt come back.
I was using:
nohup... (2 Replies)
Hi All,
I am very new to unix and to this forum.Suggest me a solution in fixing the below issue.
Actually ia m executing java program through script.
The command is like
java pgm &
The above cmd runs the java program continuous as a background thread.
This script is executed from a... (1 Reply)
Discussion started by: sahan
1 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$SHELL -c". This doesn't work as intended:
ssh host touch 'hi there' # fails
It creates 2 files, hi and there. Instead, do this:
cmd=`shell-quote touch 'hi there'`
ssh host "$cmd"
This gives you just 1 file, hi there.
process find output
It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to
split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote:
eval set -- `find -type f -print0 | xargs -0 shell-quote --`
debug shell scripts
shell-quote is better than echo for debugging shell scripts.
debug() {
[ -z "$debug" ] || shell-quote "debug:" "$@"
}
With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.
save a command for later
shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command
you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
things the user can't pass through), you can do something like this:
user_switches=
while [ $# != 0 ]
do
case x$1 in
x--pass-through)
[ $# -gt 1 ] || die "need an argument for $1"
user_switches="$user_switches "`shell-quote -- "$2"`
shift;;
# process other switches
esac
shift
done
# later
eval "shell-quote some-command $user_switches my args"
OPTIONS --debug
Turn debugging on.
--help
Show the usage message and die.
--version
Show the version number and exit.
AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions.
AUTHOR
Roderick Schertler <roderick@argon.org>
perl v5.8.4 2005-05-03 SHELL-QUOTE(1p)