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1. Shell Programming and Scripting
Hi
I have a requirement wherein i need to purge some directories.
I have more than 2000 directories where i need to keep data for 10 days and delete the rest. What i am looking for is an efficient way to achieve this.
There are four mount points from where i need to delete the files.
... (3 Replies)
Discussion started by: Apoorvbarwa
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2. Shell Programming and Scripting
Hello all,
I have a script that has to get variables remotely. Rather than having the script login to the remote server 3 separate times, is there a faster way to get each variable?
##Server comes from input or list##
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3. UNIX for Dummies Questions & Answers
Hi,
Often when I use echo statements in scripts I echo a line of #'s above and below. For example:
echo #####
echo hello world
echo #####
However, I generally have a series of about 75 #'s. For example:
echo #(x 75)
echo hello world
echo #(X 75)
While this helps to delineate... (7 Replies)
Discussion started by: msb65
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4. Shell Programming and Scripting
Hi
I have a set of options in the form of key value in a file. Need to find a particular value of 'a' and delete all lines till the next 'a' keyword .
Ex :
a bbb
c ddd
e fff
g hhh
a sss
c ggg
e xxx
f sss
a ddd
d sss
r sss
g hhh (5 Replies)
Discussion started by: TDUser
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5. Shell Programming and Scripting
I am new to the boards and to shell programming and have a requirement to name new files received with a unique sequence number. I need to look at a particular file pattern that exists and then to increment a sequence by 1 and write the new file.
Example of file names and sequence #
... (4 Replies)
Discussion started by: sandiego_coder
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6. UNIX Desktop Questions & Answers
hi friens, :)
if i need to find files with extension .c++,.C++,.cpp,.Cpp,.CPp,.cPP,.CpP,.cpP,.c,.C
wat is the pattern for finding them
:confused: (2 Replies)
Discussion started by: arunsubbhian
2 Replies
7. Programming
I have a lot of processes all of which need to write quite
a lot of data to the filesystem ( to a single file).
This is managed today in the following way : all the processes
write the data to a shared memory block, which is manged by a process that empties it to a file, thus allowing more... (7 Replies)
Discussion started by: Seeker
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8. Filesystems, Disks and Memory
I have a lot of processes all of which need to write quite
a lot of data to the filesystem ( to a single file).
This is managed today in the following way : all the processes
write the data to a shared memory block, which is manged by a process that empties it to a file, thus allowing more... (1 Reply)
Discussion started by: Seeker
1 Replies
9. IP Networking
Do anyone telle me please how to use PING command to verify connection (TCP/IP) between serveurs.
thanks (1 Reply)
Discussion started by: hoang
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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)