Hi,
I need some help in removing the header (first line) and the trailer (last line) in a give file...
The data file actually comes in EBCDIC format and I converted it into ASCII..
Now I need to strip off the first line and the last line..
I think we can use sed to do something like this:... (2 Replies)
So, I want to read line-by-line a text file with unknown number of files....
So:
a=1
b=1
while ; do
b=`sed -n '$ap' test`
a=`expr $a + 1`
$here do something with b etc
done
the problem is that sed does not seem to recognise the $a, even when trying
sed -n ' $a p'
So, I cannot read... (3 Replies)
Hi all
Is there a way to read and process a gzip file line by line similar to a text file without using gzcat..
while processing a text file we will usually use the logic
exec<sample.txt
while read line
do
echo $line
done
Is there a similar way to process the gz file in the same... (4 Replies)
I have a whole file structure with jpeg files where I want to remove a part of the file name. An application added in many files a case conflict in the naming "xyz 017.jpg (Case Conflict 1)"
So, can someone help me how to get rid of the " (Case Conflict 1)"? What I have is this:
find . -name... (2 Replies)
Good afternoon!
I am a perl newbie. I hope you will be patient with me.
I have a script that needs to be written in perl. I can't do it in awk or shell scripting.
Here is the script:
#!/usr/bin/perl
use POSIX qw(strftime);
use FileHandle;
use Getopt::Long;
use IO::Handle;... (0 Replies)
Hi,
I have some files with some extension e.g. abc.xml.REMOVE,xyz.xml,efg.xml.REMOVE .
I have to remove the .REMOVE extension. I can display it using the below script but cannot rename it.
ls -l|sed 's/\.REMOVE//'
How can I rename this?
Thanks in advance (7 Replies)
I have crontab job a tar file to a directory ( tar -cvf /tmp/backup/or.`date +%m%d%y`. /ora/db/* ) , it will do it every day . Now I don't want to keep too much files , I just want to keep the file for 90 days , can advise if I want to remove the backup file which are elder than 90 days , can... (1 Reply)
Hi,
Though I was successful in following query, I like to know the other ways of doing it.
I have a file that is sent as an attachment via mail. However, while opening it, notepad does not recognize new line character whereas other editors like text pad recognizes new line character of unix.... (2 Replies)
Hi Gurus,
I have a file which contains some special char or space.
when using cat -evt I can see the file as following:
0,"0000","abc/def aaa ... (6 Replies)
Discussion started by: ken6503
6 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)