Notice that in the second case the asterisk is preserved. It would, in the context above, then be transferred (and maybe expanded, depending on a matching file existing there) by the remote system. In other words, the whole construct is totally unpredictable because it depends on the presence as well as the absence of certain files locally AND remotely.
i have a script that uses an ant build.xml and its targets to pull a project from a cvs server, attempt to build the project, and then email me the results. When I run the script (either @ CLI or as a cron job) while I am logged in, everything works fine. However, if the script is set up to run... (5 Replies)
I have the following crontab entry to run a shell script for every 30 minutes of every day:
30 * * * * $HOME/main.sh > $HOME/main.log 2>$HOME/error.log
after I created the crontab file I have also done:
$crontab my_crontab
I also check to make sure it exists, by using the following... (11 Replies)
hi guys,
i have a problem.
a week ago i made a successful crontab that execute bash scripting daily, it worked well
but now, it doesn't work at all, in the mail i have:
"
/home/jimmy/cha/scripts/cekpderr
produced the following output:
lagi jalan
/home/jimmy/cha/scripts/cekpderr:... (6 Replies)
I have a script running in the crontab that gets data from a database every hour. Now I would like to execute a fortran routine to process the data in some way, after getting it and saving it locally.
I have added the following commands to my script:
set convert =... (1 Reply)
I wrote a script to shutdown the oracle database. The script works fine when I manually run the script. However, when i schedule a job, i get the following error.
Shutting Down cmismart ....................
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
SVR4... (6 Replies)
Hi all,
I really need your help ASAP on this. Below is the description of my problem and a sketch of Autosys
Job Activity Console
++++++++++++++++++++++++++++++++
File View Options
+++++++++++++++++++++++++++++++
Job Name Description Status Command Machine... (1 Reply)
The .profile file should be read when the user logs in. So, there should be no need to execute .profile file again in a cron job (since the cron job is run after the user logs in). Doesn't the cron require login from the user. Then, from where does the cron execute? Please help!! (1 Reply)
Hi,
I am trying to execute a script (for once) during the booting time in Ubuntu system. However, the result is only showing the strings without without the variables.
Here is the script:
MgrIp=$(ec2-describe-instances --filter tag:Name=Mgr --filter instance-state-name=running | egrep... (4 Replies)
Dear *nix users.
I'm on Mac OS 10.6 / Terminal and try to use crontab to schedule two scripts every 30 minutes and every 41 minutes.
I followed the man instructions and created / installed a crontab file for the current user:crontab -e
with the following content
*/30 * * * *... (4 Replies)
Dear All,
My server is running crontabs of 4 different users.
I want to develop a script that whenever a particular change occurs in a crontab , it is detected and the particular change is noted into a file.
Kindly let me know of suggestions on how it can be achieved.
My algo would be:
... (1 Reply)
Discussion started by: Junaid Subhani
1 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)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 v5.16.3 2010-06-11 SHELL-QUOTE(1)