05-25-2017
This was an no harm intended update, since that was on my mind
Quote:
Originally Posted by
bakunin
I like to to script most of my work as an admin: not because of the development process itself but because this way i can assure
i can enjoy my bbq while stuff does itself as it should
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
How do we list all the file names in a directory that does not belong to current date. (1 Reply)
Discussion started by: esh.mohan
1 Replies
2. UNIX for Dummies Questions & Answers
How do we list all the file names in a directory that does not belong to current date. (3 Replies)
Discussion started by: esh.mohan
3 Replies
3. Post Here to Contact Site Administrators and Moderators
Hi,
I submitted my blog on UNIX in the links section. On submitting, i chose the category as Unix/Linux standards, which i now feel is incorrect. I would like to change the category of my link, but i don't find any option to change the category.
Please help me in doing the needful.
Thanks... (7 Replies)
Discussion started by: guruprasadpr
7 Replies
4. Shell Programming and Scripting
Hi All,
Would it be possible using awk to split a given file into two files based on a certain condition such that one output file will contain all lines that fit the condition while the other output file will contain lines that did not fit the condition?
Here is a sample input file
... (6 Replies)
Discussion started by: cympaulife
6 Replies
5. Shell Programming and Scripting
I'm trying to list files, first by size and I'm using something like this
ls -l|awk '{print $5,$6,$7,$8,$9|"sort -nr"}'|more
Now I'd like to just do the same listing but only for files with the year 2009 in the $8 field or even anything less than 2011. (5 Replies)
Discussion started by: NycUnxer
5 Replies
6. Shell Programming and Scripting
Hi,
I have a file and I want the category for each row to be its highest value.
gene highest medium lower lowest
ABC 20 30 50 70
DEF 90 20 60 0
o/p
gene highest medium lower lowest category
ABC... (6 Replies)
Discussion started by: Diya123
6 Replies
7. UNIX for Dummies Questions & Answers
i want run query to identify witch groups that user A belong,
CN=name,CN=Users,DC=mydomain ?? (1 Reply)
Discussion started by: prpkrk
1 Replies
8. Shell Programming and Scripting
Please consider the following file, I have many groups which can be of 3 types, T1 (Serial_Number 1) T2 (Serial_Number 2) and T1*T2 (all other Serial_Number).
I want to only consider groups that have both T1 and T2 present and their values are different from each other. In the example file,... (8 Replies)
Discussion started by: jianp83
8 Replies
9. Shell Programming and Scripting
I want to categorize and count the as below:
Input file:
A1 G1 C1 F1
A2 G1 C1 F1
A3 G1 C1 F2
A4 G1 C2 F2
A7 G1 C2 F2
A8 G1 C2 F3
A11 G1 C2 F3
A23 G1 C2 F3
B4 G1 C2 F3
AC4 G2 C3 F4
B6 G2 C4 F4
BB5 G2 C4 F4
A25 G2 C5 F4
B13 G2 C5 F5
D12 G2 C5 F5
D2 G2 C5 F5 (3 Replies)
Discussion started by: aydj
3 Replies
10. UNIX for Beginners Questions & Answers
i have a requirement to delete records that do not belong to that day. For example in a file that came on July 31st ,2018 there are records that belong to Aug 1st,2018 as well and I want to find and delete those records. I want to delete anything with 01-Aug-2018. I have several files like that. I... (6 Replies)
Discussion started by: Priya
6 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)