Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Print the first four characters of hostname
Top Forums Shell Programming and Scripting Print the first four characters of hostname Post 302141692 by drl on Monday 22nd of October 2007 01:00:14 AM
Old 10-22-2007
Hi.
Quote:
Originally Posted by yxian
... I dont understand why some like:
hostname -s | sed '/..../p'
wont work? ...
Because that sed line says: "If the incoming line has 4 characters then print it."

If you wanted to print just the first 4 with sed, you could use:
Code:
hostname -s | sed 's/^\(....\).*/\1/'

which seems cumbersome compared to the cut, but sed is capable of much more than cut ... cheers, drl
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Solaris - unknown hostname - how can I change hostname?

Hello, I am new to Solaris. I am using stand alone Solaris 10.0 for test/study purpose and connecting to internet via an ADSL modem which has DHCP server. My Solaris is working on VMWare within winXP. My WinXP and Solaris connects to internet by the same ADSL modem via its DHCP at the same... (1 Reply)
Discussion started by: XNOR
1 Replies

2. Shell Programming and Scripting

Print the characters in a word

Hi, How can I split the characters in a word? For Eg: If my input is: command my output should be: c o m m a n d Please help me in doing it so. (5 Replies)
Discussion started by: chella
5 Replies

3. Shell Programming and Scripting

print 10 characters in series

suppose fileA kanika123ABC 1222222222222222 raciat5678ty 1221123333331121 jessica78ulllo 2233243223333333 so output shud be print only first 10 characters in series and rest remain same kanika123A 1222222222222222 raciat5678 1221123333331121 jessica78u ... (1 Reply)
Discussion started by: cdfd123
1 Replies

4. Shell Programming and Scripting

print ip to hostname with array

Hi Anyone can help me??i writing a perl using array to translate ip address to the hostname my script are below.this line print "$myhost{$ipaddr}\n"; blank :mad:hostname dint come out:mad::mad: #!/usr/local/bin/perl @ipaddr=("192.1.168.2","172.25.1.13","129.1.2.5"); %myhost = { 192.1.168.2... (4 Replies)
Discussion started by: netxus
4 Replies

5. Shell Programming and Scripting

Use awk to print first 6 characters

Hi, i want to use awk to print the first 6 characters of a variable awk -F"|" '$3>0 { print $3 }' z00.unl > z001.unl but $3= 7 digits and i just want to print the first 6 digits. eg 1005779 but i want to print only 100577 (3 Replies)
Discussion started by: dealerso
3 Replies

6. Shell Programming and Scripting

Print N characters in ksh

Hi, I have this header on a script: echo "*************************************" How can I print 1000 "*" characters without to put them on the echo command? Understand? THIS IS AN EXAMPLE WHAT I NEED: print "1000 *" Or is possible to print or echo "*" characters until they... (8 Replies)
Discussion started by: iga3725
8 Replies

7. Emergency UNIX and Linux Support

HP UX - ILO Console hostname different than Machine Hostname...

Hi All, So we added a new HP-UX 11.31 machine. Copied OS via Ignite-UX (DVD)over from this machine called machine_a. It was supposed to be named machine_c. And it is when you log in...however when I'm in the ILO console before logging in, it says: It should say: What gives? And how do... (4 Replies)
Discussion started by: zixzix01
4 Replies

8. Shell Programming and Scripting

How to print the first 7 characters of each column

Hello all, I have a data like this: X:04252 X:05524 X:04176 X:05509 X:05524 X:04674- X:1662912 X:10181 X:16491 X:05506 X:05216- X:05488 X:46872 X:08471 X:04834 X:30170 The except result is like this: X:04252 X:05524 X:04176 X:05509 X:05524 X:04674 X:16629 X:10181... (3 Replies)
Discussion started by: yhkoo
3 Replies

9. Shell Programming and Scripting

How to print last character of hostname and assign to a variable ?

Hi How to pass echo output to a variable ? Does below awk command will get the last character of hostname and assign to a variable - "svr" ? svr=$( echo `hostname` | awk '{print substr($0,length,1)}' ) Thanks. Please use CODE tags when dsplaying code segments, sample input, and sample... (7 Replies)
Discussion started by: Lim
7 Replies

10. Shell Programming and Scripting

awk remote multiple hosts print remote hostname and output

Hi all, i'm trying to gether multiple pattern on remote hosts, and trying to print hostname and the pattern, ssh remoteserver1 -C 'hostname 2>&1;cat /var/log/server1.log | awk -F ";" '"'"'{ print " "$2" "$5}'"'"'| sort | uniq -c | sort -g -r ' The output is the following, remoteserver1 ... (8 Replies)
Discussion started by: charli1
8 Replies

LEARN ABOUT LINUX

shtool-subst

SHTOOL-SUBST.TMP(1)					      GNU Portable Shell Tool					       SHTOOL-SUBST.TMP(1)

NAME

       shtool-subst - GNU shtool sed(1) substitution operations

SYNOPSIS

       shtool subst [-v|--verbose] [-t|--trace] [-n|--nop] [-w|--warning] [-q|--quiet] [-s|--stealth] [-i|--interactive] [-b|--backup ext]
       [-e|--exec cmd] [-f|--file cmd-file] [file] [file ...]

DESCRIPTION

       This command applies one or more sed(1) substitution operations to stdin or any number of files.

OPTIONS

       The following command line options are available.

       -v, --verbose
	   Display some processing information.

       -t, --trace
	   Enable the output of the essential shell commands which are executed.

       -n, --nop
	   No operation mode. Actual execution of the essential shell commands which would be executed is suppressed.

       -w, --warning
	   Show warning on substitution operation resulting in no content change on every file. The default is to show a warning on substitution
	   operations resulted in no content change on all files.

       -q, --quiet
	   Suppress warning on substitution operation resulting in no content change.

       -s, --stealth
	   Stealth operation. Preserve timestamp on file.

       -i, --interactive
	   Enter interactive mode where the user has to approve each operation.

       -b, --backup ext
	   Preserve backup of original file using file name extension ext.  Default is to overwrite the original file.

       -e, --exec cmd
	   Specify sed(1) command directly.

       -f, --file cmd-file
	   Read sed(1) command from file.

EXAMPLE

	#   shell script
	shtool subst -i -e 's;(c) ([0-9]*)-2000;(c) 1-2001;' *.[ch]

	#    RPM spec-file
	%install
	    shtool subst -v -n 
		-e 's;^(prefix=).*;1 $RPM_BUILD_ROOT%{_prefix};g' 
		-e 's;^(sysconfdir=).*;1 $RPM_BUILD_ROOT%{_prefix}/etc;g' 
		`find . -name Makefile -print`
	    make install

HISTORY

       The GNU shtool subst command was originally written by Ralf S.  Engelschall <rse@engelschall.com> in 2001 for GNU shtool.  It was prompted
       by the need to have a uniform and convenient patching frontend to sed(1) operations in the OpenPKG package specifications.

SEE ALSO

       shtool(1), sed(1).

18-Jul-2008							   shtool 2.0.8 					       SHTOOL-SUBST.TMP(1)
All times are GMT -4. The time now is 04:37 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy