Hi I am trying to send a file form one linux server into an another linux server.
I cannot do ftp get. Can anyone please assist me how can I push the file to the other server ?
Thanks. (2 Replies)
I'm trying to write a script that will start an X application if it's not already running, but will find it and pop it to the front if it is already running (maybe it's lost on a busy desktop).
Is there such a mechanism?
Here is part of the logic: VRDP="$(ps ax|grep "rdesktop .*... (3 Replies)
I need to use pushd and popd to navigate all of the subdirectories in my current directory.
I know how to get into each subdirectory, add it to the stack, and pop back out, but i cant figure out how to get into subdirectories deeper than the first without adding a foreach and if statement for... (1 Reply)
We have a cluster of 3 web servers. I'll be updating a single master server and copying info to the other 2 slave servers. What's the best way of synching all of them? Run rsync on each of the slave servers to pull the updates from the master? Or run rsync on the master to push the updates to the... (1 Reply)
Hello everyone,
I am new to Perl and I am having some issues getting a script to work. I have to create a script that uses an array of 52 cards, "shuffles" the cards (using loops with the pop, shift, and push commands), and prints out the top five. This is not a randomizing of the array just a... (2 Replies)
Hello!
Please I need some help on writing a script to push files from one server to the other once a day, everyday. I know that I can use this script on a crontab to send the files , but I am not sure how to start writing it, the actual script.
I could start by declaring some variables:
... (4 Replies)
Discussion started by: fretagi
4 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)