can anyone point me to a comparison of *nix file systems ?
i think i prefer a journalling fs
but i would like to see a comparison between several fs's before i make up my mind (2 Replies)
Hi all,
Hope that we are all familiar with the "script" command, which helps us to record the session into any file, until we give "exit".
Can anyone help me, how to do this process from a shell script!? I face problem while ending the script using "exit" which comes out of the program. This... (3 Replies)
Hi,
I'm new in Unix an ShellScripting and I need a programm that create a sequence diagramm graphically from a shell script.
I am just working for 2 weeks in Unix and the Shell. And it would help to understand the whole shellsscripts.
Is there a freeware tool, that can create such a thing?... (1 Reply)
Hello experts,
(tcsh shell)
Quite new to shell scripting...
I have got a file with a single word on each line. Want to be able to make a comparison such that i can read pairs of words that are ROT13 to each other. Also, i would like to print the pairs to another file.
Any help... (5 Replies)
I need some help which would probably be for most of you a simple script.
I need to read in the data from a .dat file and then compare avg to see who is the highest avg. Here is my script so far.
#!/bin/ksh
#reading in the data from lab3.dat
filename=$1
while read name o1 o2 o3 o4 o5 o6... (0 Replies)
Hi Everybody,
I am in urgent need of a solution.
I need to carry out SFTP activities through a shell script.
I have generated public and private keys as shown below:
Shell-Prompt$> ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key... (2 Replies)
Hello,
this is not exactly a unix specific question however i am sure someone out there may answer my question. The problem is that i write shellscripts and now i want to convert all these shellscripts to .txt. Is it possible?
or if someone knows how to copy the content of shellscript then also... (3 Replies)
hi guys
i need a program that can compare a value read from a com-port and one from the terminal.
can somebody help me???
using linux kernel 2.6.14-M5
can only use standard function in sh and bash... (5 Replies)
Hello folks,
I have two files, which have usernames, I want to see the contents of file1.txt which is missing in file2.txt and another comparison file2.txt contents which is missing in file1.txt. please suggest.
file1.txt
user
u2
u8
a9
p9
p3
u4
z8
aaa
ahe
oktlo (7 Replies)
Discussion started by: learnbash
7 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)