Optimize shell code Post: 302435112

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

optimize shell script (snapshots)

I've a script to do some snapshots but the time it does so is very different... once i got a snapshot under 1 sec, on the other hand it took 3 sec, but nothing else changed, i didnt even move the cursor or something. I put the script on a ramdisk and its faster, but still swing from under 1...

2. Shell Programming and Scripting

pl help me to Optimize the given code

Pl help to me to write the below code in a simple way ... i suupose to use this code 3 to 4 places in my makefile(gnu) .. **************************************** @for i in $(LIST_A); do \ for j in $(LIST_B); do\ if ;then\ echo "Need to sign"\ echo "List A = $$i , List B =$$j"\ ...

3. Shell Programming and Scripting

Optimize the nested IF

Hi, I have to assign a value for a varaiable based on a Input. I have written the below code: if then nf=65 elif then nf=46 elif then nf=164 elif then nf=545 elif then nf=56 elif then

4. Shell Programming and Scripting

Can someone please help me optimize my code (script searches subdirectories)?

Here is my code. What it does is it reads an input file (input.txt which contains roughly 2,000 search phrases) and searches a directory for files that contains the search phrase. The directory contains roughly 1900 files and 84 subdirectories. The output is a file (output.txt) that shows only the...

5. UNIX for Dummies Questions & Answers

optimize if block : shell script

Hi, I need a shell script to determine if a no. is either even, greater than 4, less than 8 SHELL : ksh OS : RHEL 6 this is the if block of the script mod=`expr $num % 2` if || || then echo "No. is either even or greater than 4 or less than 8" fi this code works...

6. Shell Programming and Scripting

Optimize my mv script

Hello, I'm wondering if there is a quicker way of doing this. Here is my mv script. d=/conversion/program/out cd $d ls $d > /home/tempuser/$$tmp while read line ; do a=`echo $line|cut -c1-5|sed "s/_//g"` b=`echo $line|cut -c16-21` if ;then mkdir...

7. Shell Programming and Scripting

Optimize shell script to run faster

data.file: contact { contact_name=royce-rolls modified_attributes=0 modified_host_attributes=0 modified_service_attributes=0 host_notification_period=24x7 service_notification_period=24x7 last_host_notification=0 last_service_notification=0 host_notifications_enabled=1...

8. Shell Programming and Scripting

Looking to optimize code

Hi guys, I feel a bit comfortable now doing bash scripting but I am worried that the way I do it is not optimized and I can do much better as to how I code. e.g. I have a whole line in a file from which I want to extract some values. Right now what I am doing is : STATE=`cat...

9. Shell Programming and Scripting

Optimize awk code

sample data.file: 0,mfrh_green_screen,1454687485,383934,/PROD/G/cicsmrch/sys/unikixmain.log,37M,mfrh_green_screen,28961345,0,382962--383934 0,mfrh_green_screen,1454687785,386190,/PROD/G/cicsmrch/sys/unikixmain.log,37M,mfrh_green_screen,29139568,0,383934--386190...

10. Shell Programming and Scripting

Help Optimize the Script Further

Hi All, I have written a new script to check for DB space and size of dump log file before it can be imported into a Oracle DB. I'm relatively new to shell scripting. Please help me optimize this script further.

LEARN ABOUT PLAN9

truncate

TRUNCATE(1)							   User Commands						       TRUNCATE(1)

NAME

       truncate - shrink or extend the size of a file to the specified size

SYNOPSIS

       truncate OPTION... FILE...

DESCRIPTION

       Shrink or extend the size of each FILE to the specified size

       A FILE argument that does not exist is created.

       If  a  FILE  is	larger than the specified size, the extra data is lost.  If a FILE is shorter, it is extended and the extended part (hole)
       reads as zero bytes.

       Mandatory arguments to long options are mandatory for short options too.

       -c, --no-create
	      do not create any files

       -o, --io-blocks
	      treat SIZE as number of IO blocks instead of bytes

       -r, --reference=RFILE
	      base size on RFILE

       -s, --size=SIZE
	      set or adjust the file size by SIZE bytes

       --help display this help and exit

       --version
	      output version information and exit

       The SIZE argument is an integer and optional unit (example: 10K is 10*1024).  Units are K,M,G,T,P,E,Z,Y (powers of 1024) or KB,MB,... (pow-
       ers of 1000).

       SIZE  may also be prefixed by one of the following modifying characters: '+' extend by, '-' reduce by, '<' at most, '>' at least, '/' round
       down to multiple of, '%' round up to multiple of.

AUTHOR

       Written by Padraig Brady.

REPORTING BUGS

       GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
       Report truncate translation bugs to <http://translationproject.org/team/>

COPYRIGHT

       Copyright (C) 2017 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       dd(1), truncate(2), ftruncate(2)

       Full documentation at: <http://www.gnu.org/software/coreutils/truncate>
       or available locally via: info '(coreutils) truncate invocation'

GNU coreutils 8.28						   January 2018 						       TRUNCATE(1)