HI , Please see the above program.I got the output but now i have to compare the strings "C" and "D" using matching concept.Can anyone tell me how can i compare those two strings using strings matching concept.
Read the shell manual to see what is the differences between = and ==
Hi,
Iam using split command to split the files.
Splitted files will be named as xaa
xab
xac
xad etc.
Directories will be test1,test2,test3.....
Now i want to select the splitted files one by one and have to place in test directories.
can anybody give the soulution??? (2 Replies)
Hi,
i want to read a full file.
If i want to split the file and by reading parralel each, i can save the time.
Can any body give me the suggesion??
ia m using this function to read a file and using that i have to grep in another file. since the file 1 is huge it is taking lot of time.
... (3 Replies)
Hi,
I am looking for a PDF or an e-book which can show in details how to do Shell Scripting or Programming. Can anybody provide me with a link to such a tutorial? I have downloaded some tutorials but they show only basics and not give any in-depth study material.
I am using Red Hat Linux... (2 Replies)
Hi Gurus
I am very new to Unix Shell Prog. I have a file in format
Q1 Dirname-FileName Score Remarks
i.e. containing columns separated by space. I want to read Column 1 and 2 and then join them to make a string that would be a path to a file. I will use this string to fetch the files and... (4 Replies)
Hi guys
i have two different line
input
M5.7&a : M5 minimum density is 20%, maximum density is 80%,
DENSITY PERM=M5.8&a(180) ......... 6 violations found.
M6.7&a : M6 minimum density is 20%, maximum density is 80%,
DENSITY A=M6.8&a(180) ......... 6 violations found.
need... (2 Replies)
Guys,
What do you think is the best way to learn UNIX and shell scripting?
** I keep on searching tutorials online, where I loose most of my time :(
Let me know the way you learnt the UNIX concepts, your replies might help me learn more.
Thanks a ton:b: (2 Replies)
Hello! :)
I currently got the task of programming a UNIX Shell for practice. The functionality is as follows:
1. Entering commands with the keyboard. Enter stops the input and creates a process which should start any program
2. the shell waits for termination of each command before... (1 Reply)
1. The problem statement, all variables and given/known data:
Hello! :)
I currently got the task of programming a UNIX Shell for practice. The functionality is as follows:
1. Entering commands with the keyboard. Enter stops the input and creates a process which should start any program
2.... (0 Replies)
Create 2 files in unix in 2 different directories, compare them and fetch common words between these 2 files. Print them on the screen and also redirect the output to your home directory in the below format: file 1 | file 2 line no: word 1 | line no: word 1 line no: word 2 | line no: word 2 line... (11 Replies)
Discussion started by: mounica bijjala
11 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)