Hi ,
I need to remove the 5th character of column1 and print the rest.
Can anybody give some advice?
Input:
0001c xx
0001r gg jj
0002y vv
0002p kk
0003q gg ll
0003v tt
0003t gg pp kk
Output:
0001 xx
0001 gg jj (9 Replies)
Hello, i am bit stuck with making script for automatic procedure.
Case:
Two files. One is flat file, other is csv file.
csv file has two column/fields with comma delimited data.
Here is what i need (explained way)
CSV file:
field1 | field2
"hello","byebye"
"hello2","byebye2"... (23 Replies)
Hi all,
Wondering how this could be accomplished........
a directory contains sequentially numbered files from fw01 to fw999.
How would I insert an additional zero so that the directory lists these files in a proper manner?
(i.e. all double digit files from fw01 to fw99 would become... (3 Replies)
I need to be able to take the results from ls -l command and modify the output as follows:
I will run
ls -l *.mak
My results will be
aa.mak
bb.mak
cc.mak
I then need to take those results and create a file that has the following info:
dsjj/ubin/aa
dsjj/ubin/bb
dsjj/ubin/cc
... (3 Replies)
Discussion started by: jclanc8
3 Replies
5. Forum Support Area for Unregistered Users & Account Problems
Hi, unix newbi here.
Im currently on the bash shell, what are the commands to run additional shells?
for example i want to run csh and then ksh?
Thanks.
BT. (2 Replies)
I am trying to use awk to find all the $2 values in file2 which is ~30MB and tab-delimited, that are between $2 and $3 in file1 which is ~2GB and tab-delimited.
I have just found out that I need to use $1 and $2 and $3 from file1 and $1 and $2of file2 must match $1 of file1 and be in the range... (6 Replies)
I am trying to create a cronjob that will run on startup that will look at a list.txt file to see if there is a later version of a database using database.txt as the source. The matching lines are written to output.
$1 in database.txt will be in list.txt as a partial match. $2 of database.txt... (2 Replies)
Hi
I use multipath linux command to get LUNs info and find out if any failed.
# multipath -ll >/tmp/mpfail
# cat /tmp/mpfail
multipath.conf line 109, invalid keyword: user_friendly_names
multipath.conf line 153, invalid keyword: user_friendly_names
multipath.conf line 193, invalid... (4 Replies)
Discussion started by: prvnrk
4 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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 v5.8.4 2005-05-03 SHELL-QUOTE(1p)