grep for a particular pattern and remove 5 lines above the pattern and 6 lines below the pattern
root@server1 # cat filename
Shell Programming and Scripting test1
Shell Programminsada asda
dasd asd Shell Programming and Scripting Post New Thread
Shell Programming and S sadsa ... (17 Replies)
Hi,
I have a file, which is having a pattern "SEARCH" somewhere towards end of the file,
if i am giving " grep -i "SEARCH" $File" , it is taking too much time as file is very big.
So i want to search for the pattern from the back side of the file, how can we search for a pattern in bottom... (5 Replies)
Hi,
i have a small requirement where i have to get the bottom most line from a file to the topmost position. a small example is shown below..
$ cat beep.txt
It is first documented as being played in southern England.
In the 16th century.
By the end of the 18th century,
Cricket is a... (5 Replies)
I have a file like below and want to use awk to solve this problem. The record separator is ">". I want to look at each record section enclosed within ">". Find the row with the 2nd and 3rd columns being 0, such as
10 0 0
I need to take the first number which in this case is 10. Then... (15 Replies)
Hi Folks
I need a one liner to parse through a log and if the string is found print the line above, the line with the string and the line below.
example:
The ball is green and blue
Billy through the ball higer.
Jane got hurt with the ball.
So if I search for Billy I would need the 3... (1 Reply)
Hello forum,
Seems that only I have alot of questions regarding Ubuntu :D
In Ubuntu 12.04 LTS the gnome I have been using gdm and lightdm.
In lightdm the top and side bars are aka "unity" and can be removed using apt-get remove unity
I need to do the same for menu bars gdm. I do not... (0 Replies)
Hi,
i have a file which contains PID and wanted to execute kill command. but the thing is, when killing PID's needs to kill PID from bottom to top.
Please help
INPUT
21414 sh -c extract.ksh ASA
21416 /bin/ksh extract.ksh ASA
21428 /usr/bin/perl -w /var/tmp/tempperl.21416 ASA... (4 Replies)
Dear All
I was wondering if someone could help me in resolving an issue.
I have a file like this:
column1 column2
2 4
3 5
8 9
0 12
0 0
0 0
9 0
87 0
1 0
1 0
1 0
4 0 (2 Replies)
Discussion started by: giuliangiuseppe
2 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)