One more request please could you explain the command line
printf '1,$s/see/saw/g\nwq!\n' | ex -s "${i}" as i am not much familiar with this. Is it possible to execute this line at the command prompt as i am getting an error like "bash: ./r1.txt: Permission denied"
i currently am using a unix server and NT pc. i have downloaded a ziped file that should explode into 3 seperate unix based files, however when i unzip it using Alading Expander it displays only 1. This exploded version contains all 3 files ( you can scroll down when viewing the file and see the... (1 Reply)
hi i would like to know whether i can delete a part of a file in C
for eg. if my file contained
1234567890
and i want to delete
456
so that it becomes
1237890
is there a way i can do this.
well, one way i can achieve this is by creating a new file, copy whatever i want, then... (2 Replies)
:(
what is the best way of editing the various .plist files without adding third party files? Or is the easiest way is to add third party applications, which ones? please kept in mind that i am not a programmer.
mike (1 Reply)
I attempted to change the IP of my Solaris 9 box by changing these files:
/etc/hosts
/etc/hostname.dmfe0
And when I rebooted my system, the changes did not come up through the reboots. I have searched high and low and this is how you change the IP address permanently. Can anyone tell me what... (2 Replies)
hi guys,
We have to implement new local (/etc/default/login) USER security policy on almost 50 stations.
so editing /etc/default/login and /etc/default/passwd will be way too long work.
Can we do the same using some script, I mean editing the above files and putting variables as RETRIES=3, ... (5 Replies)
Hi All,
I have a folder that contains 100's of files and each file have a similar content like the following format:
((STBJa:200.0,((STBTz:200.0,(STSwe:200.0,(STDUw:200.0,(ST4Bu:200.0,STL2b:200.0):127.0):86.0):80.0):120.0,
STAHr:200.0):134.0):200.0,STuNg:200.0);What I need is to do is add "#1"... (2 Replies)
I am working in C and need a solution for below problem:
I have a binary file, which needs to be edited in such a way no data is loss.
For example i have to insert 3 bytes of data at some position without changing the contents of the file.
if file has data as:... (2 Replies)
hello,
i have a problem.
suppose
file.txt
i want to add lines over those lines in a file if it starts and ends with how and "?" respectively.
i want output like
output
file.txt
thanks (4 Replies)
#!/bin/bash
#
name=$1
type=$2
number=1
for file in ./**
do
if
then
filenumber=00$number
elif
then
filenumber=0$number
fi
tempname="$name""$filenumber"."$type"
if (4 Replies)
This is a smallpart of my input file.I want to change the ID values of entries having CMW as an entry.
Cont_1.266 . CMW 2958 3269 . - 0 PARENT=t:UM06506T0;ID=UM06506P0;rank=6
Cont_1.266 . CMW 3394 3505 . - 0 ... (3 Replies)
Discussion started by: sasdf
3 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)