I'm a new member of the forum, I had this new generate file since I use 'grep' and 'awk', what I want to do is get rid off the all 0s before the numbers, is there any one who could help me to figure it out? Thanks a lot!
yun
0000000029 000q7472 2002/03/01
0000000030 000q7472 2002/03/01
... (2 Replies)
Hello,
I got this question which tells me to customize my login script. Some people in the forums suggested to modify the .profile file in my home directory. I did so, but none of my customizations show up when I open the terminal after.
So, I tried to modify other files in my home directory,... (1 Reply)
Hi All,
I have a file like below, how can i insert one line after line 1 without using a temporary file in perl?
line 1
line 2
line 3
expected result
line 1
new line <---insert here
line 2
line 3 (2 Replies)
Hi,
I have a file that looks like this:
27+:<10,289808,1>
31+:<11,1445372,1>
33-:<7,1014101,2>
35+:<11,728811,1>
36-:<11,1445205,0>
37+:<11,1445792,2>
and I want to change it to this:
+ 10 289808
+ 11 1445372
- 7 1014101
+ 11 728811
- 11 1445205
+ 11 1445792 (3 Replies)
hello,
I have problem with writing/adjusting a shell script.
I searched forum and unfortunately couldn't write scipt based on the information I found.
I never wtire such so it's hard for me and I do need to modify one script immediately.
case looks like:
1. 'file' that needs to be modified... (3 Replies)
Hi All
I am getting a file with below pattern -
00150366 05/08/2015 07:14:32
8000186167+++ 50195281000000000371001010903236
800186167+++ 100209000000000
800000018617+++ 50295281000000000371001010900217================================3u4398482344334=432434
00150367 05/08/2015 07:14:32... (7 Replies)
Hi, I would like to change my CSV file by adding " and : and moving some of the information around. the CSV file looks as follows:
501254424;500440257;PE PACKS;300467279;PREP;;276476070;655031001867176;Two Block;Olga;25/12/2015 00:00:00;Olga
I would like to move the field 7 to the front "... (13 Replies)
Running Oracle Linux 6 (derivative of RHEL 6)
Given this snippet of code in a shell script:
#-- reset oratab to use 11.2 home for dwdev
#-- normally we'd just use sed to do this sort of thing, but that would
#-- require permissions that we don't have in the /etc/ directory, so we
#-- ... (3 Replies)
Discussion started by: edstevens
3 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)