I'm new to unix scripting. How would I go about pulling the first 3 characters from a variable in ksh and storing in another variable? Thanks. (9 Replies)
Hey all,
I have been using Ksh and in that I am setting Environment variables.
To set Env. Variables I have created my own file "BuildScript.sh" in which i have written :
export CLASSPATH=/somedir/some other dir/file:.
export PATH=/some dir/file:.
But when i am calling this... (4 Replies)
hi all,
how do i subract variables in shell ?? am trying to space out the headers and the output generated by the shell so they all line up :
currently the output is like this :
servers : users
server1 : 10
latestServer : 50
so i thought... (3 Replies)
I'm trying to set a variable to the output of a command.
This is what the comand output to the display looks like:
/>hciconndump -v TOsiu
Dump of connection(s): TOsiu
----------------------------------------------------------------------
Process: A60Tsiu Connection: TOsiu... (2 Replies)
Hello,
I have a problem combining two variables into one.
I did the following:
in my env variables i had set
PATH_DESTINATION_1=/root/path_one
PATH_DESTINATION_2=/root/path_two
#!/usr/bin/ksh
count=1
count_path=2
while
do (3 Replies)
Hi,
I 'm trying to send an e-mail for every different line in the .txt
for i in {1..$variable}
do
sed -n "/$i$/p" text.txt
done
I have two problems about this.
First one is that for loop doesn't work
and the second one is that i cant get the output of sed (4 Replies)
Hello, I am a new joiner to the forum, and have what i hope is a simple question, however I can't seem to find the answer so maybe it is not available within bash scripting.
I intend to use the below script to archive files from multiple directories at once by using a loop, and a variable (n)... (10 Replies)
Cannot combine these two strings into one line, either as a 3rd variable or echo or printing ? Frustrating.
for i in `cat /scripts/pathList.dat`
do
OldRepo= grep Oldhostname ${i}/.svn/entries | tail -1
NewRepo= grep Oldhostname ${i}/.svn/entries | tail -1 | sed '/Oldhostname/... (41 Replies)
Hi Friends ,
I want to know how to format the output for the following:
i searched in the forum and couldnt get the exact requirement.
Thanks in advance . (2 Replies)
Here is the whole script, very simple, but I am just learning
ROK_NO=$1
RPT=/tmp/test
sed -E '/^SELECT/ s/(.{23}).{8}/\1'"$ROK_NO"' /' $RPT
echo $RPT
When I run this I get
$ bash rok.sh 2388085
: No such file or directory
/tmp/test
When I type the command in console, it works... (3 Replies)
Discussion started by: isey78
3 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)