I have a file with the following contents;
NEW 85174 MP081 /29OCT07
CNL 85986 MP098 /28OCT07
NEW 86014 MP098 /28OCT07
NEW 86051 MP097 /27OCT07
CNL 86084 MP097 /27OCT07
Now I have to retrieve all lines that start with NEW and where the next line starts with CNL and where the MP codes are... (8 Replies)
Can anyone help me in a scriptfor below example which has to find the string "System && Passcode 0" or "System && Failcode ??"
If this searched string occurs consecutively 4 times it should provide output as error
S.No : Program: Status
1. was : Passcode 1
2. System: Passcode 0... (1 Reply)
I have a script that takes an option for server pools to run the script against. The option is given as a comma separated list (ie, -p 201,204,301).
I'm using eval and brace expansion to get those pool numbers into an array. It works fine unless only 1 pool number is given. Here's the code:
... (5 Replies)
Hi ,
could anyone help me out with this problem.
sample.txt has this content :
u001- this is used for project1 ||
u002- this is used for p2|| not to be printed
u003- this is used
for project3 ||
u004- this is
used for p4 ||
u005- this is used for project5 ||
u006- this is used for p6... (9 Replies)
I have to create some fixed width files using UNIX. The data source is an Oracle SQL query. If I use straight SQL and spool to a file everything comes out as expected.
Example Desired result (. indicate blank space):
V278814831..................................1743049591.10N... (6 Replies)
# cat email.txt | grep -i "To:"
To: <test@example.com>
# cat email.txt | grep -i "Subject"
Subject: Test
Subject: How are you.
I need to print only test@example.com from To field need to eliminate "< & >" from To field and need to print entire subject after Subject:
It should be
#... (7 Replies)
Hi I need a bash script that can search through a text file for all lines starting with 71502FSC1206 on every line it finds starting with this I need to place a letter F at the 127 position on that line.
Thanks
Paul (6 Replies)
if i have to do pattern match for file name with digit alphanumeric value like this
File_1234.csv
File_12sd45rg.csv
i am using this File_*.csv
and File_*.csv for digit pattern match.
when i am doing pattern match for the digit then both alphanumeric match
and digit match is coming.
... (3 Replies)
Hello All,
Could you please do help me here as I would like to perform parameter expansion in shell over a parameter expansion.
Let's say I have following variable.
path="/var/talend/nat/cdc"
Now to get only nat I could do following.
path1="${path%/*}"
path1="${path1##*/}"
Here... (8 Replies)
Discussion started by: RavinderSingh13
8 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)