=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3279 - January 31, 2016
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
DEALING WITH TOO MANY FILES
In case there are too many files in a
particular directory and you try doing
$ grep "ABC" *
And it fails saying
ksh: /usr/bin/find: 0403-027 The parameter list is too long.
what would you do?
Well you can do the following:
$ls |xargs grep "ABC"
This tip generously supported by: puneeta@delhi.tcs.co.in
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==========================================================================
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, 31 Januari 2016
Sabtu, 30 Januari 2016
Unix Tip: GET YOUR IP-ADDRESS
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UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3278 - January 30, 2016
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
GET YOUR IP-ADDRESS
Type this simple command at the unix-prompt
ifconfig | grep "inet addr" | grep -v "127.0.0.1" | awk '{print $2;}' | awk -F':' '{print $2;}'
This tip generously supported by: sgrover@delsoft.com
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==========================================================================
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
==========================================================================
UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3278 - January 30, 2016
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
GET YOUR IP-ADDRESS
Type this simple command at the unix-prompt
ifconfig | grep "inet addr" | grep -v "127.0.0.1" | awk '{print $2;}' | awk -F':' '{print $2;}'
This tip generously supported by: sgrover@delsoft.com
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==========================================================================
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
==========================================================================
Jumat, 29 Januari 2016
Unix Tip: BACKUP INDEX LOCATIONS
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UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3277 - January 29, 2016
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
BACKUP INDEX LOCATIONS
Couple words on your backups index.
1) When doing backups on your systems
make sure that your backup indexes are
not stored on the same disks that you
may need to recover files from. If you
loose the disk that the files are on then
you still have your backups safe. If
you loose the disks with your backup
indexes, your files are still okay and
the users will be able to work. You can
then spend the day scanning your indexes
from tape.
2) Make sure that you backup your indexes
occasionally using tar, dump, cpio or
something else other than your normal backup
software.
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==========================================================================
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
==========================================================================
UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3277 - January 29, 2016
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
BACKUP INDEX LOCATIONS
Couple words on your backups index.
1) When doing backups on your systems
make sure that your backup indexes are
not stored on the same disks that you
may need to recover files from. If you
loose the disk that the files are on then
you still have your backups safe. If
you loose the disks with your backup
indexes, your files are still okay and
the users will be able to work. You can
then spend the day scanning your indexes
from tape.
2) Make sure that you backup your indexes
occasionally using tar, dump, cpio or
something else other than your normal backup
software.
--------------------------------------------------------------------------
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==========================================================================
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
==========================================================================
Kamis, 28 Januari 2016
Unix Tip: DELETING BLANK LINES USING GREP
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UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3276 - January 28, 2016
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
DELETING BLANK LINES USING GREP
To delete a blank line using a grep command you can use the next
command :-
grep -v "^ *$" file-y > file-x
where file-y is the input files has blank lines and file-x will
be the output file ( excluding the blank lines ).
if we use ( grep -v "^$" ) only , the blanck line which include
spaces will not be removed.
This tip generously supported by: yousif_morckos@yahoo.com
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==========================================================================
DISCLAIMER: All UNIX HOT TIPS ARE OWNED BY THE UNIX GURU UNIVERSE AND ARE
NOT TO BE SOLD, PRINTED OR USED WITHOUT THE WRITTEN CONSENT OF THE UNIX
GURU UNIVERSE. ALL TIPS ARE "USE AT YOUR OWN RISK". UGU ADVISES THAT
ALL TIPS BE TESTED IN A NON-PRODUCTION DEVELOPMENT ENVIRONMENT FIRST.
Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
==========================================================================
UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3276 - January 28, 2016
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
DELETING BLANK LINES USING GREP
To delete a blank line using a grep command you can use the next
command :-
grep -v "^ *$" file-y > file-x
where file-y is the input files has blank lines and file-x will
be the output file ( excluding the blank lines ).
if we use ( grep -v "^$" ) only , the blanck line which include
spaces will not be removed.
This tip generously supported by: yousif_morckos@yahoo.com
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==========================================================================
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
==========================================================================
Rabu, 27 Januari 2016
Unix Tip: THE BAD AND THE GOOD
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UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3275 - January 27, 2016
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
THE BAD AND THE GOOD
I cringe anytime I see someone code inefficiently. Here are
three of the most common mistakes, followed by a better way to
do the same thing.
Bad: cat somefile | grep something
Better: grep something somefile
Why: You're running one program (grep) instead of two (cat
and grep).
Bad: ps -ef | grep something | grep -v grep
Better: ps -ef | grep [s]omething
Why: You're running two commands (grep) instead of three (ps
and two greps).
Bad: cat /dev/null > somefile
Better: > somefile
Why: You're running a command (cat) with I/O redirection,
instead of just redirection.
Although the bad way will have the same result, the good way is
far faster. This may seem trivial, but the benefits will really
show when dealing with large files or loops.
This tip generously supported by: sec@nbnet.nb.ca
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==========================================================================
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
==========================================================================
UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3275 - January 27, 2016
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
THE BAD AND THE GOOD
I cringe anytime I see someone code inefficiently. Here are
three of the most common mistakes, followed by a better way to
do the same thing.
Bad: cat somefile | grep something
Better: grep something somefile
Why: You're running one program (grep) instead of two (cat
and grep).
Bad: ps -ef | grep something | grep -v grep
Better: ps -ef | grep [s]omething
Why: You're running two commands (grep) instead of three (ps
and two greps).
Bad: cat /dev/null > somefile
Better: > somefile
Why: You're running a command (cat) with I/O redirection,
instead of just redirection.
Although the bad way will have the same result, the good way is
far faster. This may seem trivial, but the benefits will really
show when dealing with large files or loops.
This tip generously supported by: sec@nbnet.nb.ca
--------------------------------------------------------------------------
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==========================================================================
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
==========================================================================
Selasa, 26 Januari 2016
Unix Tip: SUSPEND A VI SESSION FOR SHELL
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UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3274 - January 26, 2016
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
SUSPEND A VI SESSION FOR SHELL
Ever want to run some shell commands while doing a vi edit
session? Like, "what's the name of that file" I want to use in
this script I'm making?
Instead of exiting vi; doing the ls filenamepart*, and going
back into vi, you can from a vi session:
enter ":", then enter "shell".
This suspends the vi session and gives you a command prompt
where you can use any shell command. When finished, enter the
"exit" command and you will be returned to the vi session.
This tip generously supported by: cwhenske@gatx.com
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==========================================================================
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
==========================================================================
UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3274 - January 26, 2016
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
SUSPEND A VI SESSION FOR SHELL
Ever want to run some shell commands while doing a vi edit
session? Like, "what's the name of that file" I want to use in
this script I'm making?
Instead of exiting vi; doing the ls filenamepart*, and going
back into vi, you can from a vi session:
enter ":", then enter "shell".
This suspends the vi session and gives you a command prompt
where you can use any shell command. When finished, enter the
"exit" command and you will be returned to the vi session.
This tip generously supported by: cwhenske@gatx.com
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==========================================================================
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
==========================================================================
Senin, 25 Januari 2016
Unix Tip: BC AND NOT BEFORE AD
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3273 - January 25, 2016
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
BC AND NOT BEFORE AD
Fire up our old friend and often forgotten bc.
% bc
Enter your arthimetic expression
20+20
Will return
40
but the best part is, use the
"obase" and "ibase" commands for all
your conversion needs.
For example, type:
obase=16
then type:
255
This will output "FF".
Next, if you type:
obase=2
Then a dot (or period), it stands for
"the last number")
It will return "11111111", that's 255 in binary!
If you need hex to dec,
just type "ibase=16" and "obase=10"
Have fun!
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==========================================================================
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
==========================================================================
UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3273 - January 25, 2016
http://www.ugu.com/sui/ugu/show?tip.today
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
BC AND NOT BEFORE AD
Fire up our old friend and often forgotten bc.
% bc
Enter your arthimetic expression
20+20
Will return
40
but the best part is, use the
"obase" and "ibase" commands for all
your conversion needs.
For example, type:
obase=16
then type:
255
This will output "FF".
Next, if you type:
obase=2
Then a dot (or period), it stands for
"the last number")
It will return "11111111", that's 255 in binary!
If you need hex to dec,
just type "ibase=16" and "obase=10"
Have fun!
--------------------------------------------------------------------------
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==========================================================================
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
==========================================================================
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