Which one should it be? To do it in VI(m) (as your subject suggests) it would be
To do it without VI(m) (as the body of your message suggests), use Yogesh' suggestion, with 2 corrections:
I am trying to substituted a variable to a file using sed. However, the value of that variable is not being substituted. Here is an example of my code.
lf='
'
v_whole="${1} ${2} ${3} $lf"
cp ${IPPDIR}/ctl/fax_sub_text_a.${4}.${5}.txt... (1 Reply)
In a file I want to globally change a "|" charater by a new line character.
I am using the command
1,$s/\|/??/g
Can anybody say what should I put in place of ?? in the above command? (3 Replies)
Hi,
I knw its a silly question, but am a newbie to 'vi' editor. I'm forced to use this, hence kindly help me with this question.
How can i paste a chunk 'copied from' a different editor(gedit) in 'vi editor'?
As i see, p & P options does work only within 'vi'. (10 Replies)
Hi All,
I am running a script , working very fine on cmd prompt. The problem is that when I open do crontab -e even after setting editor to vi by
set EDITOR=vi it does not open a vi editor , rather it do as below.....
/////////////////////////////////////////////////////
$ set... (6 Replies)
Hi,
What is the actual difference between these two? Why the following code works for process substitution and fails for command substitution?
while IFS= read -r line; do echo $line; done < <(cat file)executes successfully and display the contents of the file
But,
while IFS='\n' read -r... (3 Replies)
Hi everyone,
I am new to linux and practicing using vim editor.
I am trying to substitute a word hi to hello
and i can do this using by the following command
s/hi/hello
but this will only substitute only the first occurrence of hi
and
s/hi/hello/g will substitute every occurrence... (4 Replies)
How do i substitute ' with space in a file using sed or awk
i am getting the following two scenarios
1) xyz'd with xyz d
if i use
sed 's/xyz\\\'d/xy z/g'
it is taking ' after \ as closing expr for substitution
2) xyz';d with xyz d
please advice (8 Replies)
Hello, I'm trying to do a substitution in vi. which adds a field for the year to a line.
If the line doesnt include a year, it should still add a field (although empty)
the fields are:
Country:number:number:name(and sometimes year):place
this is a desired in and output:
Sweden:55:32:John... (2 Replies)
I am trying to do some substitutions using the substitution operator (:%s) in a text file.
I want to replace all A1, A2, A3.......A100 in my text file.
I used :%s/A2/SAE/g successfully until A9 but when I use A1, all the A11 to A19 is changed. How do I specify the exact match here? (8 Replies)
Discussion started by: Kanja
8 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)