How can I redirect value of say only one variable s1 into a file say s1.txt.
But I am getting an error Illegal Statement.
I have used backticks but no success. Can you help me with that ?
Please give us some context. Are you giving this command to the shell? If that is what you're doing, you want something like:
Are you using this command in an action clause in an awk script? If that is what you're doing, Akshay already showed you how to do that. (Although he removed the single quotes you seem to want displayed around the numeric quantity that you're printing and added a space to the output after the comma. And if this is part of an awk script that is not read from a file using awk -f awk_script, you can't print single quotes that way unless you play lots of games with the way you give the rest of the script to your shell.)
Hi
I need to append the following block of statements in the middle of the file:
#
openpipe tsdbdwn2
set -x
exec >> /tmp/tsdbdwn2.fifo 2>&1
#
This needs to be appended right after another block of statements:
if test $# -eq 0 ;then
echo "Safety check - do you really wish to run" $0 "... (5 Replies)
(1) Yes but how is this block different from the other 24? You will need this information in order to identify and replace this block correctly (out of the 25).
Ans: The 1st line and last line of this block are unique from other block.
The 1st line is “rem Subset Rows (&&tempName.*) and
The... (1 Reply)
Hi there, If I run "ipmitool bmc info" on any of my x86 boxes, i get
Device ID : 32
Device Revision : 1
Firmware Revision : 1.1
IPMI Version : 2.0
Manufacturer ID : 42
Manufacturer Name : Sun Microsystems
Product ID ... (7 Replies)
I was reading a book on UNIX internals "The design of the UNIX Operating system." There are two memory structures that are confusing me:
1) Buffer cache
2) Inode cache
My questions are
1) Does a process get both buffer cache and Indoe cache allocated when it opens/creates a file?
2) if no,... (1 Reply)
Hei buddies,
Need ur help once again.
I have a file which has bunch of lines which starts from a fixed pattern and ends with another fixed pattern.
I want to make use of these fixed starting and ending patterns to select the bunch, one at a time.
The input file is as follows.
Hi welcome... (12 Replies)
I have a "main" file which has blocks of data for each user defined by tags BEGIN and END.
BEGIN
ID_NUM:24879
USER:abc123
HOW:47M
CMD1:xyz1
CMD2:arp2
STATE:active
PROCESS:id60
END
BEGIN
ID_NUM:24880
USER:def123
HOW:4M
CMD1:xyz1
CMD2:xyz2
STATE:running
PROCESS:id64
END (7 Replies)
I want to process a file block by block using sed, and if that block does not contain two patterns, then that complete block has to be printed.
See below for the example data.
................................server 1...............................
running process 1
running... (8 Replies)
please consider the following file, there are repeated blocks of m values, and nested s values within. there are 2 columns (cols 3 and 4)associated with each m,s combination. All s1 rows must get a value of a(col 3 in output), all s2 values must get a value of b(col 3 in output). If s1 and s2 rows... (1 Reply)
I need to search for a block with the starting pattern say
"tabId": "table_1", and ending pattern say "]"
and then add a few lines before "]"
"block1":"block_111"
"tabId": "table_1",
"title":"My title"
.....
....
}]
how do I achieve it using awk and sed.
Thanks,
Lakshmi (3 Replies)
Hi,
Could you please help me finding a way to replace a specific value in a text block when matching a key pattern ?
I got the keys and the values from a command similar to:
echo -e "key01 Nvalue01-1 Nvalue01-2 Nvalue01-3\nkey02 Nvalue02-1 Nvalue02-2 Nvalue02-3 \nkey03 Nvalue03-1... (2 Replies)
Discussion started by: alex2005
2 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)