Is there any way to delete the Junk Characters(Invalid Characters like ^,',",),(,&,# etc.,) at the end of each record in a file?
I want to do this using a single line script.
Thanks to all in advance!!! (5 Replies)
Hi, I've got a file where in the middle of the record is a $ end of line character, visible only when I open the file in vi and do :set list. How to I get rid of the character in the middle and keep it at the end. The middle $ character always appears after SW, so that can be used to tag it.... (3 Replies)
I have a file with 65 sets of 35 coordinates, and would like to isolate these coordinates so that I can easily copy the coordinates to another file. The problem is, I've got a 9 line header before each set of coordinates (so each set is 44 lines long). There are a zillion threads out there about... (3 Replies)
We have a server that logs transactions to a file. I want to write a script that will delete the first 50 lines of the file daily without renameing the file or moving the file. (8 Replies)
Hi All
i need to delete a recurring word from point "n" till end of the file. there are other words in this file so i cannot use `dG`, can anyone help me out?
Kind regards
Brian (4 Replies)
Hi Guys,
I have a quetion which was already discussed in the forum, but for some reason all approches suggested fail for me.
I have a file which have blank lines at the body of the text as well as at the end. I need to delete ONLY blank lines at the end. Unfortunatly the approach below does not... (5 Replies)
here is the contents of bigfile.sql
CREATE TABLE `Table11` (
`id` int(11) NOT NULL ,
`entityName` enum('Lines','EndUsers') COLLATE utf8_unicode_ci NOT NULL,
`parentAllianceMigrationProjectId` varchar(255) NOT NULL
) ENGINE=InnoDB AUTO_INCREMENT=2000 DEFAULT CHARSET=utf8... (30 Replies)
Discussion started by: vivek d r
30 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)