hi,
I'm trying to use sed to erase everything, up to the first parenthesis. for example:
input: blah blah blah (aldj) test (dafs) test test.
output: (aldj) test (dafs) test test.
how would i do this?
I was fooling around with the parenthesis, and i only got it to apply on all parenthesis.... (1 Reply)
Hi all...
I want to parse a xml filein unix .. Can i use SED or unix script to parse the xml file .. If so can anyone show a sample script that will parse the xml file ..
Thanks in advance,
Arun ,,,, (3 Replies)
I have a file, we'll call it file.txt. It has thousands of lines of all kinds of output at any given time (ie. foo bar foo bar)
I need to copy out just a portion of the file from Point-A to Point-B. I'd like to save off just that portion to a file called test123xyz.txt.
How do I do that?
... (7 Replies)
Alright, here's the deal. I'm running the following ruby script (output follows):
>> /Users/name/bin/acweather.rb -z 54321 -o /Users/name/bin -c
Clouds AND Sun 57/33 - Mostly sunny and cool
I want to just grab the "57/33" portion, but that's it. I don't want any other portion of the line. I... (5 Replies)
Hi All,
i have an output of command vmstat as below :
$ vmstat
System configuration: lcpu=4 mem=5376MB ent=1.00
kthr memory page faults cpu
----- ----------- ------------------------ ------------ -----------------------
r b avm fre re pi... (10 Replies)
hi All ,
I am having a large file with lots of modules as shown below
###############################################
module KKK
kksd
kskks
jsn;lsm
jsnlsn;
Ring
jjsjsj
kskmsm
jjs
endmodule
module llll
1kksd11
k232skks
j33sn;l55sm (6 Replies)
Hi,
I need to search for a word using Awk and print out the line the word is in and every line after the search phrase until I hit this #------------. Then I need to send it to a csv file.
So basically the input file format is like this:... (1 Reply)
Hi
I have a file profile.txt with the below input:
{"atgUserId":"736f14c4-eda2-4531-9d40-9de4d6d1fb0f","firstName":"donna","lastName":"biehler","email":"schoolathome42@live.com","receiveEmail":"y
es"},
{"atgUserId":"c3716baf-9bf8-42da-8a44-a13fff68d20f","firstName":"Gilberto... (6 Replies)
So I am writing a bash script that will search a file line by line for unix timestamps, store all of the timestamps into an array, then check how many of those timestamps were created within the last hour, and finally increment a counter every time it finds a timestamp created within the last hour.... (6 Replies)
The awk below executes and produces the current output. it skips the header in row 1 and prints $4,$5,$6 and then adds the header row back.
The problem is that it keeps the tailing tab and prints it in front of $1. I could add a pipe to remove the tab, but is there a better way to do it with on... (7 Replies)
Discussion started by: cmccabe
7 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)