Hello everybody !
GOT SOMETHING INTERESTING...
I am trying to retain line number for a text document.. usually we get line numbers in VI using :set nu , but I want to permanently store them. It's a 4000 lines of text and I want grep/search it for a list of words/fields stored in a different... (2 Replies)
hi,
could anyone tell me the command to append spaces at the end of the line.
for example, i need 1000 spaces after the word "helloworld"
echo "helloworld " i need to achieve this in someother way hardcoding 1000 spaces is not practical.
as i am totally new... (3 Replies)
Hi,
I am using Bash shell to create some data and these data would be piped out to a file, let say output.txt.
This output.txt I would like to add some extra header information such as comments, descriptions and general information on the text.
I would like to know how could I maintain... (0 Replies)
Hi,
I have 1 million records and want to extract lines betwen 10000 -20000 and put it in another file.
Could you please suggest a command for this.
Thanks in advance (3 Replies)
Hello.
I have written a bash script that I am sharing with an OS X community I am a member of. The purpose of the script is to execute a series of commands for members without them having to get involved with Terminal, as it can be daunting for those with no experience of it at all. I have renamed... (4 Replies)
There are directories of files that I have to run the dos2ux command on to get ride of the carriage return characters. Easy enough, but I have to retain the original timestamps on the files. I am thinking that I am going to have to strip off the timestamp for each file and convert it to unix time... (3 Replies)
Hello Firends
I have a file that contains data within single quotes, which has meaning of its own. When I am trying to parse through the file for a different functionality I noticed that I was loosing the backslash when occurrences in the file look like ('\0'). I would want to retain the... (3 Replies)
Hi,
Is there a way to write to a txt file each day but retain the header on the file? I'm cat'ing 5 files into one .txt file each day but I want the new data to be written after the first 2 lines which are:
Progname Size Date Owner
----------------------------
Basically I want my new... (4 Replies)
I am trying to add a single line of text to every file in a particular folder. There are thousands of files in the folder.
Each file contains this same start of the first line:
{d "%w- %d %m-, %Y - %T"} <some message here>
with the rest of the text following the second curly bracket... (10 Replies)
Hi, I try to explain my problem , I have a file like this:
aasdsaffsc23
scdsfsddvf46567
mionome0001.pdb
asdsdvcxvds
dsfdvcvc2324w
What I need to do is to create 1000 files in which myname line listing a sequence of numbers from 0001 to 1000. So I want to have :
nomefile0001.txt that must... (10 Replies)
Discussion started by: danyz84
10 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)