Can anybody help me out with this problem
" a shell program that takes one or any number of file names as input; sorts the lines of each file in ascending order and displays the non blank lines of each sorted file and merge them as one combined sorted file. The program generates an error... (1 Reply)
Hi,
I have a file a.lst which lists all files.
as
a.dat
b.dat
c.dat
I want to process these files mentioned in the list file in a loop.
Say I want to display only the first line of all the files a.dat , b.dat, c.dat.
How can I go about it?
Please help. (5 Replies)
Okay...
I've solved one problem.
Here's the next.
I'm writing a script file that needs to go through a directory and list all files in that directory.
I'm using TCL/TK.
I figured out how to go through the directory and how to loop through it, but I ran into a little problem.
... (2 Replies)
Hi
I want to merge two or more files using perl in windows only(Just like Paste command in Unix script) . How can i do this.Is ther any single command to do this?
Thanks
Kunal (1 Reply)
I have three different linux command scripts that I run for 20+ files in one directory.
it goes like this
FIRST SCRIPT:
grep 'something' -w file > newfile1
.
.
.
grep 'something -w file > newfile20
then I take all these 'newfileN' and run this:
awk 'BEGIN {... (20 Replies)
Hello,
I have two txt files that look like this:
db.0.0.0.0:
Total number of NS records = 1
db.127.0.0.0:
Total number of NS records = 1
Total number of PTR records = 1
db.172.19.0.0:
Total number of NS records = 1
Total number of PTR records = 3
db.172.19.59.0:
Total... (8 Replies)
Hi,
I have a very basic knowledge of shell scripting & would like some help with a little problem I have. I sometimes use a program calle phronix & sometimes like to compare its results which are *.xml files. Which is easy enough but a friend wants to avoid typing the path to the files.... (2 Replies)
I am trying to write a script that loops through all the files in the current directory that end in '.slg.gz' and runs a parser on each file. Here is my code:
#!/bin/bash
FILES_HOME = 'dirname $0'
for i in $(ls $FILES_HOME/.slg.gz$);do
./run-feature-parser $(i) > OUTPUT.csv
done ... (1 Reply)
I have a need to merge two files on the value of an index column.
input file 1
id filePath MDL_NUMBER
1 MFCD00008104.mol MFCD00008104
2 MFCD00012849.mol MFCD00012849
3 MFCD00037597.mol MFCD00037597
4 MFCD00064558.mol MFCD00064558
5 MFCD00064559.mol MFCD00064559
input file 2
... (9 Replies)
All,
I have an excel sheet Excel1.xls that has some entries.
I have one more excel sheet Excel2.xls that has entries only in those cells which are blank in Excel1.xls
These may be in different workbooks. They are totally independent made by 2 different users.
I have placed them in a... (1 Reply)
Discussion started by: Anamika08
1 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)