Hi,
I have files that are named front1.txt to front999.txt. They are all in the same directory. To change "front" to "back", I am doing something like this.
for file in *.txt; do
new=`echo $file | sed 's/^**/back/g'`
mv $file $new
done
My problem is what if files are named... (6 Replies)
hi!
i have a file consisting of the following lines:
(BTW, = space)
.
.
.
12ME_T1mapping_flip30bshortf
13DCE_whole_brainbshortf
13DCE_3Dbshortf
.
.
.
the list of scans starts at 1 and goes on sometimes up to 60 scans. i would like to change only the lines that contain 'whole' to... (2 Replies)
Hello,
I really would appreciate some help with a bash script for some string manipulation on an SQL dump:
I'd like to be able to rename "sites/WHATEVER/files" to "sites/SOMETHINGELSE/files" within the sql dump.
This is quite easy with sed:
sed -e... (1 Reply)
I am trying to find words in a text with a certain ending with sed and replace them with themselves but wrapped in tabs
ex.: The fish swims in the water. -> searching for -ms ending
The fish <tab>swims<tab>in the water.
I've been trying all sorts of commands and get either an error... (5 Replies)
Hi,
I am taking the current time using localtime function in perl. For example if the time is:
#Using localtime
$time = "12:3:10";
I have to replace the value 3 (03) i.e second position to be 03.
The output should be:
12:03:10
But if the other string for example:
$str:... (1 Reply)
Hi
I need to Replace a part of string in between one complete string.
For e.g..
in the file the value is as:
jobnm_$code_xyz_001
In script we are having a variable code=$3, where $3=ab
final output should be jobnm_ab_xyz_001.
But it is not working. Your help will be... (1 Reply)
Hello there,
I need some help.
I have a file containing this :
$ cat file
PARM1=(VAL11),PARM2=(VAL21,VAL22,VAL23),PARM3=(VAL31),PARM4=(VAL41,VAL42)
and I need to replace all the ',' by '|' but only those which are between brackets.
Output would be :... (10 Replies)
i have something like this...
echo "teCertificateId" | awk -F'Id' '{ print $1 }' | awk -F'te' '{ print $2 }'
Certifica
the awk should remove 'te' only if it is present at the start of the string.. anywhere else it should ignore it.
expected output is
Certificate (7 Replies)
here is what i want to achieve... consider a file contains below contents. the file size is large about 60mb
cat dump.sql
INSERT INTO `table1` (`id`, `action`, `date`, `descrip`, `lastModified`) VALUES (1,'Change','2011-05-05 00:00:00','Account Updated','2012-02-10... (10 Replies)
Discussion started by: vivek d r
10 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)