10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi
I have a file which is tab-delimited. Now, I'd like to print the lines which have "chr6" string in both first and second columns. Could anybody help? (3 Replies)
Discussion started by: a_bahreini
3 Replies
2. Homework & Coursework Questions
Florida State University, Tallahassee, FL, USA, Dr. Whalley, COP4342 Unix Tools.
This program takes much of my previous assignment but adds the functionality of printing the concatenated line numbers found within the input.
Sample input from <> operator:
Hello World
This is hello
a sample... (2 Replies)
Discussion started by: D2K
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3. Shell Programming and Scripting
sample text:
001 the quick brown fox jumps 987 over a lazy dog
002 the quick brown fox jumps 999 over a lazy dog
003 the quick brown cow jumps 888 over a lazy dog
004 the quick brown fox jumps 777 over a lazy dog
005 the quick brown fox jumps 666 over a lazy cat
i want to do something... (1 Reply)
Discussion started by: marcpascual
1 Replies
4. SCO
Does anybody know how I can stop the system slewing pages when a spool file has finished printing.
I need to set up a method where all users are printing to the same printer to produce labels.
The problem is that when the first users file has been printed the pages are slewed and the label is not... (2 Replies)
Discussion started by: rongrout
2 Replies
5. Shell Programming and Scripting
I have one file of numbers
4
5
2
...
And another file of strings
aaaaa bbbbb
ccccc ddddd
eeeee ffffff
...
I'd like to print the stings from each line in reverse order with some decoration the number of times listed in the first file
such as:
Yeah bbbbb aaaaa
Yeah bbbbb aaaaa (5 Replies)
Discussion started by: dcfargo
5 Replies
6. UNIX for Advanced & Expert Users
I am trying to print to an hp printer. i configured it using the hp configuration, entry is in the /etc/hosts file, i can telnet into it using port 9100, ping it and send jobs to it. it just won't print. the jobs stay in the spooler. its telling me to add the printer to the canaccess list. ... (0 Replies)
Discussion started by: Rosario
0 Replies
7. UNIX for Dummies Questions & Answers
Hello,
Not sure where to begin on describing the issue; please try to understand that I am not very familiar with SCO UNIXWARE. I am a newbie...
We have a SCO UNIXWARE version 7.4 when we restart the computer we are required to enter the command lpstart, without it; people cannot print.
... (1 Reply)
Discussion started by: Yorgy
1 Replies
8. UNIX for Dummies Questions & Answers
When I print a file from an application it never stops printing. Any ideas? (2 Replies)
Discussion started by: 744eagle
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9. IP Networking
I have a printer installed on sun solaris m/c sun os 5.8. It doesn't print more than 52 files i.e if a give lp *.txt and the curent folder contains more than 52 files then it doesn't print them but if print in batches , each containing 52 files then it prints them properly.
How do i increase the... (3 Replies)
Discussion started by: kapilv
3 Replies
10. UNIX for Dummies Questions & Answers
Hi ,
Can somebody Please help me in finding out where I am going wrong.
Suppose i have a file called r_wer which contains files.
for ex :
LMN20001
LMN20002
LMN20003
Now I want to print them.
The way I am doing is
$ for a in `cat '/r_wer'`
> do
> lp -d printername $a
> done
But... (3 Replies)
Discussion started by: rooh
3 Replies
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)
NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)