Unix and Linux Tips

Kamis, 25 Agustus 2005

Unix Tip: FOLDING IN LINUX

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 2428 - August 25, 2005

http://www.ugu.com/sui/ugu/show?tip.today

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FOLDING IN LINUX

Fold Long Line files to Finite Width output device files.

Ex: fold -b < long_line_file >folded_file

Now the folded_file will contain output with newlines inserted after maximum bytes specified. This will be useful when editing special files. You can do the reverse using "expand" command.

This tip generously supported by: srinu.sasubilli@wipro.com

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GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.

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Rabu, 24 Agustus 2005

Unix Tip: THE NEXT UID

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 2427 - August 24, 2005

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THE NEXT UID

Here is one way to find out the next available UID on a system.

It takes both the password and group files and finds the next available UID and displays it.

(No cats were harmed in the making of this script)

#!/bin/bash
awk -F":" '{ print $3 }' /etc/passwd > number_list
awk -F":" '{ print $3 }' /etc/group >> number_list
A=` sort -g number_list | tail -1`
A=`expr $A + 1`
echo "New Available UID is $A"

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
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Selasa, 23 Agustus 2005

Unix Tip: TRANSFERRING MULTIBYTE FILES

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 2426 - August 23, 2005

http://www.ugu.com/sui/ugu/show?tip.today

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TRANSFERRING MULTIBYTE FILES

Do you find trouble in transferring multibyte binary data files to Windows and then read through HexEditor ? (Or some such windows based application )

Try Solaris/HP-UX command /usr/bin/od to generate octal and hexadecimal Dump !

-x Interpret words in hex.

$od -x <Raw_File_Name>

will generate Hex View on stdout. For more usage on the command explore "man od".

This tip generously supported by: tcs2@ideacellular.com

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
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Senin, 22 Agustus 2005

Unix Tip: LOGGING MAKES

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= UNIX GURU UNIVERSE UNIX HOT TIP Unix Tip 2425 - August 22, 2005 http://www.ugu.com/sui/ugu/show?tip.today =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= LOGGING MAKES To keep the log of make task or compilation session or build package process, you may do: $ make bzImage 2>&1|tee build.log To append further log to a file, continue with: $ make modules 2>&1|tee -a build.log This tip generously supported by: ophil@gstu.gomel.by -------------------------------------------------------------------------- To Subscribe: http://www.ugu.com/sui/ugu/show?tip.subscribe To Unsubscribe: http://www.ugu.com/sui/ugu/show?tip.unsubscribe To Submit A Tip: http://www.ugu.com/sui/ugu/show?tip.today ========================================================================== DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST. Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001 ==========================================================================

Minggu, 21 Agustus 2005

Unix Tip: ALIAS YOUR CONNECTIVITY

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 2424 - August 21, 2005

http://www.ugu.com/sui/ugu/show?tip.today

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ALIAS YOUR CONNECTIVITY

For quicker access to remote systems alias your telnet, ssh, ftp, or rlogin connections to save time.

alias srocket 'ssh -l myaccount rocket.foo.bar.com'
alias sfrocket 'sftp -l myaccount rocket.foo.bar.com'
alias trocket 'telnet rocket.foo.bar.com'
alias rrocket 'rlogin -l myaccount rocket.foo.bar.com'

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
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Sabtu, 20 Agustus 2005

Unix Tip: CHECK SENDMAIL SETTINGS

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UNIX HOT TIP

Unix Tip 2423 - August 20, 2005

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CHECK SENDMAIL SETTINGS

Don't think that sendmail is configured correctly and want to check your sendmail settings:

# echo '$=R' | /usr/lib/sendmail -bt -d0.4

Version 8.9.3+Sun
Compiled with: MAP_REGEX LOG MATCHGECOS MIME7TO8 MIME8TO7 NAMED_BIND
NDBM NETINET NETUNIX NEWDB NIS NISPLUS QUEUE SCANF SMTP USERDB
XDEBUG
canonical name: foobar.com
a.k.a.: foobar
a.k.a.: fii.foobar.com
UUCP nodename: foobar
a.k.a.: foobar.com
a.k.a.: loghost
a.k.a.: [206.99.99.99]
UUCP nodename: foobar
a.k.a.: [127.0.0.1]

============ SYSTEM IDENTITY (after readcf) ============
(short domain name) $w = foobar
(canonical domain name) $j = fii.foobar.com
(subdomain name) $m = foobar.com
(node name) $k = foobar
========================================================

ADDRESS TEST MODE (ruleset 3 NOT automatically invoked)
Enter <ruleset> <address>
> >

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