Hi, ive just been given a HP UX c180 to play with, along with a few external hd`s, can anyone recommend me a good place to start learning unix please as i havent got a clue what im doing when it comes to unix.
Either web links or book recomendations would be great.
I would like to set it up with... (1 Reply)
I'm trying to write a script, named "worfo" which will read a file in and return, on the screen, the number of words in the file. Also, I am looking to do several extras with this script. I need to allow it to accept the option "-n" which will use all non-alpha characters to delimit words. Also,... (2 Replies)
this is my output for my crawler.
/about.html
/ads/
/advanced_search?hl=en
froogle.google.com/frghp?hl=en&tab=wf&ie=UTF-8
groups.google.com/grphp?hl=en&tab=wg&ie=UTF-8
/imghp?hl=en&tab=wi&ie=UTF-8
/intl/en/options/
/language_tools?hl=en
/maphp?hl=en&tab=wl&ie=UTF-8... (3 Replies)
hi there
i am very new to the world of CRON. i would like to know from below the ground up how i can learn abouot cron. where the best tutorials lie. i have an assignment that requires i set up a cron job to download a price file. am i in control of where the price file is downloaded to? (eg to... (2 Replies)
Hi,
I'm developing my first bash script and have made good progress but stuck at this point.
I've run sed on a text file to extract some data and have saved it into a variable e.g.
$blah
the variable contains emails as follows e.g. <a@b.com> <b@c.com>
I'm now trying to edit... (2 Replies)
Hello Guys,
I am new here and this is my first post, hope someone can help me
I am writing a script that is supposed to go in 9 different directories and edit a given file in each of the directories. I am using sed to edit the file as
sed -i 'line# s/#to be changed/#to be replaced with/... (5 Replies)
Hi folks,
I have a scenario to convert the update statements into insert statements using shell script (awk, sed...) or in database using regex.
I have a bunch of update statements with all columns in a file which I need to convert into insert statements.
UPDATE TABLE_A SET COL1=1 WHERE... (0 Replies)
$BIN/sql.py "select * from reporting.V_AMSNB_OPT_PB_LOAD" | sed -n "2,$ p" | sed "s/ /,/g" > $DATADIR/OPT_PB_LOAD_AMSNB.csv
if
The processes that get created from the above code gets stuck...as in the processes get created but then never completes. (or at least we assume it never completes... (1 Reply)
Discussion started by: mimiyj
1 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)