Hello. I have an RS/6000 running AIX 4 and I need to be able to see if there are any users that are logged on more than once from the same terminal so I can kick them off to make room for other terminals. 64 connections is the limit. Currently I am doing this:
who | more
and then manually... (11 Replies)
Hello,
I have a page where multiple fields and their values are displayed. But I am able to sort only a few fields. When I looked into the issue, it is seen that the for each row of info , an unique id is generated and id.txt is generated and saved. Only those fields which are inside that id.txt... (3 Replies)
Hi,
Let's say I have these 3 columns;
NGC1234 6 9
SL899 4 1
NGC1075 8 3
SL709 5 2
And I want to sort the data according to the first column (from a to z) like having them as:
NGC1075 8 3
NGC1234 6 9
SL709 5 2
SL899 4 1
Can that be done... (2 Replies)
Hello guys. I need help figuring this one out. It's probably really easy. Thanks in advance!
I have a file say for example containing this:
Rice Food
Carrots Food
Beans Food
Plates Kitchen
Fork Kitchen
Knives Kitchen
I need:
Food Rice, Carrots, Beans
Kitchen Plates, Fork,... (7 Replies)
Hi All,
I have a long list made of 4 columns containing entries such as the following example:
a b c d
0 0 0 0
1 2 1 2
2 5 3 4
3 8 4 6
4 10 9 8
5 15 8 10So the top row is the header and I need to arrange the data in a way as to... (11 Replies)
My actual data looks like below
i have given only format. i can't give exact data format of my requirement due to some reasons. I this set of data lines about 5000
I need to come up with information in below
exact format of my data set :
Line<space>Number1<space>"somedata":... (1 Reply)
Hi,
I have two files, one of which I would like to sort based on the order of the data in the second. I would like to do this using a simple unix statement.
My two files as follows:
File 1:
12345 1 2 2 2 0 0
12349 0 0 2 2 1 2
12350 1 2 1 2 2 2
.
.
.
File2:
12350... (3 Replies)
hi,
I would like to monitor a log file, which rolls over, everytime a server is restarted.
I would like to grep for a string, and to be more efficient i'd like to grep only newly appended data. so something like a 'tail -f' would do, however, as the log rolls over i think a 'tail -F' is... (2 Replies)
Hello.
Sorting data file by date and time with the following issues:
Date is in the following format m/d/yyyy, no leading zeros
Time is in the following format h:m:s AM/PM, no leading zeros
Any ideas on how to sort data when the above issues?
Could the date/time be converted inline to... (5 Replies)
Discussion started by: JimBurns
5 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)