Well, any shell script can ssh. Whose time for what -- Just logging what time is the date command. Any errors covers a lot of territory in even the simplest app. With ssh, your shell script here is feeding a shell there, might be bash, or not. Run this to see:
Hi guys!
I have just started with shell programming!!
I am having pronblem with variable subsitutuion.
when i do
egrep "*" marks
this will give me the pattern match.
but how can i catch the output of that result in a variable.
if i say
result = egrep "*" marks
it gives me syntax... (2 Replies)
Hi Guys,
I am trying to alter a script for my company.
I need the start of it to go something like this.
User is asked to input 8 numbers
8 numbers are written to a txt file
***** ***** ***** txt file is read ***** *****
The text file gets read in between other files represented by... (2 Replies)
Hi all,
i am beginner to unix and trying out a shell script which does the following. i have to calculate a persons salary. his salary is read from the keyboard. he has two types of deductions. 40% as dearness allowance and 20% as house rent. i have to print the gross salary. here is the code... (5 Replies)
Hi,
I have a file in which records contains non ascii characters. The records are comma delimited and quoted.
The non ascii characters are found in a particular column.
Example records
"YY","AK000021","Ã","IO","PP"
"Y1","AK000022","Ã","PO","PP"
"Y2","AK000022","Ã","PO","PP"
I need to... (2 Replies)
HELP!My program ends after entering one choice---need help making it take multiple inputs,instead of terminating after displaying just one
#!/bin/bash# Crude address databaseclear # Clear the screen.echo " Contact List"echo " ------- ----"echo "Choose one of the following... (6 Replies)
hi guys
we've had nagios spewing false alarm (for the umpteenth time) and finally the customer had enough so they're starting to question nagios. we had the check interval increased from 5 minutes to 2 minutes, but that's just temporary solution. I'm thinking of implementing a script on the... (8 Replies)
I need to create digit day script that takes a single numeric argument and then it should print out the day of the week using the number modulo 7 formula e.g: 0 - Sunday 6- Saturday 131 - Friday
I am fairly new to unix so I don't know how to use the number modulo 7 formula.
Does the script need... (3 Replies)
Hi All,
I have a script which as below
#!/bin/bash
for i in `cat servers`
do
ssh uname@$i "df -t xfs --total | grep total";
done > out.txtOutput as below
--------------
total 140583991104 118622795524 21961195580 85% -
total 140583991104 112888595524 27695395580 ... (4 Replies)
So I'm trying to pass certain json elements as env vars and use them later on in a script.
Sample json:
JSON='{
"Element1": "file-123456",
"Element2": "Name, of, company written in, a very weird way",
"Element3": "path/to/some/file.txt",
}'
(part of the) script:
for s... (5 Replies)
In Bash shell - the ps -ef shows only the /bin/bash but the script name is not displayed ? Is there any way to get the script names for the process command ?
--- Post updated at 08:39 AM ---
in KSH (Korn Shell), my command output shows the script names but when run in the Bash Shell... (3 Replies)
Discussion started by: i4ismail
3 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)