01-20-2009
9 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
is there Any command to get total count and number of free inodes on a mount. please help (5 Replies)
Discussion started by: pharos467
5 Replies
2. Shell Programming and Scripting
For example, if I have the file whose content are:
>HWI-EAS382_30FC7AAXX:7:1:927:1368
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
>HWI-EAS382_30FC7AAXX:7:1:924:1373
ACGAACTTTAAAGCACCTCTTGGCTCGTATGCCGTC
I want my output calculate the total of nucleotide. So my output should look like this:... (2 Replies)
Discussion started by: patrick chia
2 Replies
3. Shell Programming and Scripting
I have a shell script that I am pulling different zip file packages and totaling how many of each type of package is in the directory. I get a bogus total count of one in the middle of my output file (highlighted in RED) and not sure why, also would like to get a grand total of all files but not... (2 Replies)
Discussion started by: freddie999
2 Replies
4. UNIX for Dummies Questions & Answers
How does unix system administration, unix programming, unix network programming differ?
Please help. (0 Replies)
Discussion started by: thulasidharan2k
0 Replies
5. Shell Programming and Scripting
Hi Everybody,
I have the following example file...
199|TST-GURGAON|GURGAON|1
199|TST-GURGAON|GURGAON|1
199|TST-GURGAON|GURGAON|1
199|TST-GURGAON|GURGAON|1
199|TST-GURGAON|GURGAON|1
199|TST-GURGAON|GURGAON|1
199|TST-GURGAON|GURGAON|1
199|TST-GURGAON|GURGAON|1
199|TST-GURGAON|GURGAON|1... (8 Replies)
Discussion started by: sraj142
8 Replies
6. UNIX for Dummies Questions & Answers
Hi All,
When i give ls -ltr i get 'total 10' like this along with files long listing. is there any option in ls command to remove this line or do we need use head -1 command only.
$ls -ltr
total 45
-rw-r--r-- 1 abc g1 0 Jul 17 07:20 0
-rw-r--r-- 1 abc g1 744 May 9 12:10 a
-rw-r--r--... (1 Reply)
Discussion started by: HemaV
1 Replies
7. UNIX for Dummies Questions & Answers
Dear all,
I have a directory consisted of files in .jpg, .jpeg etc..all of them are image
20140411030143_62811159403_92886.jpg 5/11/2014 15:01 197K
20140415024737_62811618747_116460.jpg 4/15/2014 14:47 17K
20140415031003_62811618747_109192.jpg 4/17/2014 15:10 17K... (4 Replies)
Discussion started by: radius
4 Replies
8. Shell Programming and Scripting
Hi all,
I have found another post threads talking about count duplicate lines, but I am interested in obtain the total number of duplicates. For example:
#file.txt
a1
a2
a1
a3
a1
a2
a4
a5
#out
3 (lines are duplicates)
Thank you! (12 Replies)
Discussion started by: mikloz
12 Replies
9. Shell Programming and Scripting
Hi All ,
I have multiple pipe delimited csv files are present in a directory.I need to find out distinct count on a column on those files and need the total distinct
count on all files.
We can't merge all the files here as file size are huge in millions.I have tried in below way for each... (9 Replies)
Discussion started by: STCET22
9 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)
NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)