Hi,
In a file FILE, the following lines appear :
WORD 8 8 8
ANOTHERWORD blabla
...
Directly in the prompt, if I type
$sed '/WORD/s/8/10/g' FILE
it replace the 8's by 10's in file :
$cat FILE
WORD 10 10 10
ANOTHERWORD blabla
... (9 Replies)
I have a data of the form
0.0117843924 0. 0. 0. 0.
0.011036017 0. 0. 0. 0.
0.0103351669 0. 0. 0. 0.
4839.41211 0. 0. 0. 0.
4532.08203 0. 0. 0. 0.
I would like to insert a couple of blank lines before the 4839 line, every time it appears. The numbers in the... (2 Replies)
hi guys!!!
i am writing a script in which i take an input from user and find it in a file and replace it.
My input file looks like
hi
what your name?
allrise
my code looks is
echo "Enter the name"
read name
FILE="/opt/name.txt"
NEW_FILE="/opt/new_name.txt"
exec 0<$FILE
... (3 Replies)
i have a script that will find a certian pattern and replace it with blank space
#!/bin/ksh
for i in `cat test.txt | grep "UTILINET" | cut -c 172-191`
do
perl -pi -e 's/$i//g' test.txt
echo "Completed"
done
the command gives some of the below strings
50032E1B ... (5 Replies)
Hi,
The following code loops through every file with an error extension and then loops through all XML files in that directory and replaces the target character @ with / . The problem I have is that if there is more than one occurance of @ in each individual file it doesn't replace it. Any... (2 Replies)
I have a sample file like this
7829885 7831552 + 1 1667, 0,
35934936 35937087 - 2 1281,870, 0,1281,
I would like to replace values starts with comma with just value like 0, to 0 or 1667, to 1667.
I can do with this by using tr -d '0,' '0' <file
But the... (2 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Give the vi command for replacing all occurances of the string "DOS" with the string "UNIX" in the whole... (4 Replies)
Hi,
I am looking for bash or awk script to solve the following.
Input File 1:
>Min_0-t10270-RA|>Min_0-t10270-RA protein AED:0.41 eAED:0.46 QI:0|0|0|0.25|1|1|4|0|190
MIGLGFKYLDTSYFGGFCEPSEDMNKVCTMRADCCEGIEMRFHDLKLVLEDWRNFTKLST
EEKRLWATPAAEDFF
>Min_0-t10271-RA|>Min_0-t10271-RA protein... (5 Replies)
I have a csv which has lot of columns . I was looking for an awk script which would extract a column twice. for the first occurance the header and data needs to be intact but for the second occurance i want to replace the header name since it a duplicate and extract year value which is in ddmmyy... (10 Replies)
Discussion started by: Kunalcurious
10 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)