All,
I have a file ABC.TXT which has two records:
12345 19.93 34.94
12345 94.84 10.48
If do the following command and
grep '12345' ABC.TXT >> test1.txt
If I look at the output of test1.txt I appears as follows:
12345 19.93 34.94 12345 94.84 10.48
I... (5 Replies)
Hi all,
For a intro UNIX course I'm taking, I need to use the command "tr" to display a file on standard output without any newlines (all on one line).
I assume I would start with "cat filename | tr" but don't know what to put after tr.
Any ideas would be lovely!
Thanks. (3 Replies)
Following are the lines from /etc/sudoers.conf
bob SPARC = (OP) ALL : SGI = (OP) ALL
fred ALL = (DB) NOPASSWD: ALL
ALL CDROM = NOPASSWD: /sbin/umount /CDROM,\
/sbin/mount -o nosuid\,nodev /dev/cd0a /CDROM
Could you please help me with shell/perl script to display the records
with... (2 Replies)
I need to know what the upload speed of an Internet connection. I thought the easiest way to do this would be to transfer a file via FTP to my server using the command:
sh-3.2$ ftp -u ftp://username:password@computerdomain/directory/ file_to_be_uploaded
Note: My environment allows me to issue... (2 Replies)
I'm trying to parse COBOL code to combine variables into one string. I have two variable names that get literals moved into them and I'd like to use sed, awk, or similar to find these lines and combine the variables into the final component. These variable names are always VAR1 and VAR2. For... (8 Replies)
Hi I have the following Input
--
-- TABLE: BUSINESS_UNIT
--
ALTER TABLE RATINGS.BUSINESS_UNIT ADD CONSTRAINT FK1_BUSINESS_UNIT
FOREIGN KEY (PEOPLESOFT_CHART_FIELD_VALUE_ID)
REFERENCES RATINGS.PEOPLESOFT_CHART_FIELD_VALUE(PEOPLESOFT_CHART_FIELD_VALUE_ID)
;
ALTER TABLE... (1 Reply)
Hi guys,
I need to cut the first 12 system processes from the command ps -A. I know that the cut command forms part of the pipeline but can't understand how to cut the first 12 lines and later display them on standard output. Please help!
Many thanks, Jared. (3 Replies)
well, i am so not familiar with this kind of things but i am gonna explain extactly what i am looking for so hopfully someone can figure it out :)
i have a command that shows memory usage besides the process name, for example(the command output):
500 kb process_1
600 kb process_2
700 kb... (4 Replies)
Hi,
Need help to grep the following from a file x. I just want to grep exact match not lines and not partial word.
CONFSUCCESS
CONFFAIL
CONFPARTIALSUCCESS
>cat x
xczxczxczc zczczcxx CONFSUCCESS czczczcczc
czxxczxzxczcczc CONFFAIL xczxczcxcczczc
zczczczcz CONFPARTIALSUCCESS czczxcxzc
... (4 Replies)
Hi guys,
I have a log file that generates multiple logs about a query.
<query time='2016-04-13 13:01:50.825'>
<PagingRequestHandler>
<Before>brand:vmu</Before>
<After>brand:vmu</After>
</PagingRequestHandler>
<GroupDeviceFilterHandler>
<Before>brand:vmu</Before>
... (3 Replies)
Discussion started by: Junaid Subhani
3 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)