Hi,
In my korn shell script, I want to delete some particular text from a certain file...How can this be done? Is the below right?
ed $NAMES << EOF
echo "" > /dev/null
echo "${x} = " > /dev/null
echo "name = " > /dev/null
echo "adress = " > /dev/null
w
q
EOF (1 Reply)
Need to delete a text block inside a file, that is marked with a start and an end pattern. Eg
do not delete
not delete
<tag1>
delete everything here
here
and here
and here...
<tag2>
do not delete
do not delete....
Believe sed is able to do this job but don't get it working.
... (1 Reply)
Hi everyone,
I have text files that I want to delete lines from. I have searched through this forum for quite some time and found examples of both awk and sed. Unfortunately, I was not able to successfully do what I want. Well to some extent. I did manage to delete the first 15 lines from each... (5 Replies)
I have a filr data.txt. Its contents are
Available labels (* indicates activated, I indicates installed, R idicates running): abc-3.0.3 def-3.0.4 xyz-3.1.2-1.0
I want to delete " Available labels (* indicates activated, I indicates installed, R idicates running):"
and... (3 Replies)
How can i break a text file into parts that occur between a specific pattern?
I have text file having various xml many tags like which starts with the tag "<?xml version="1.0" encoding="utf-8"?>" . I have to break the whole file into several xmls by looking for the above pattern.
All the... (9 Replies)
In my command prompt I did:
sed 's/\://' mytextfile > newtextfile
But it only deleted the first instance of : in each line when some lines have multiple : appearing in each one. How can I delete all the : from the entire file? (1 Reply)
I have a text file that looks like this:
I want to delete the last character of first column in all rows so that my output looks like this:
Thanks a lot! (1 Reply)
Hi
I am looking for the way to delete the block of data for example
original file
line1
line2
line3
line4
line5
input file
line2
line3
original file should contain
line1
line4
line5 (3 Replies)
Hi,
I have a text file with thousands of questions in it. Each question (multiple lines) with multiple choice options, Answer and Explanation (optional). I need to delete Answer & explanation parts for all Questions and insert a blank line before net question. Each question starts with NO.
I... (4 Replies)
Discussion started by: prvnrk
4 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)