Hi Friends,
Can any of you explain me about the below line of code?
mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'`
Im not able to understand, what exactly it is doing :confused:
Any help would be useful for me.
Lokesha (4 Replies)
I am using the time-honored construct "while read field1 field2 field3 ; do" to pull delimited fields from lines of data in a file, but there are a few places within the loop where I need to manipulate the entire, unsplit line of data. Does "while read" keep each entire record/line somewhere prior... (2 Replies)
Hi all,
First off, sorry for a long post but I think I have no other option if I need to explain properly what I need help for.
I need some advise on how best to check for "faulty" or "stalled/jammed' print queues. At the moment, I have three (3) application servers which also acts as print... (0 Replies)
Hi,
I have line in input file as below:
3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL
My expected output for line in the file must be :
"1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL"
Can someone... (7 Replies)
Hello all,
i am trying to use cut or awk to make my below lines to
From
$ ps -ef|grep tns|grep -v grep |grep LISTENER_TEST|awk '{print $9}'
/oracle/ORAHOME/test/112/bin/tnslsnr
to
/oracle/ORAHOME/test/112
how can this be achieved ? so basically anything before "/bin" (3 Replies)
I have a bunch of random character lines like ABCEDFG. I want to find all lines with "A" and then change any "E" to "X" in the same line. ALL lines with "A" will have an "X" somewhere in it. I have tried sed awk and vi editor. I get close, not quite there. I know someone has already solved this... (10 Replies)
Dear Ladies & Gents,
I have a requirement to delete all the log files in /var/log/test directory that are older than 10 days and their first line begin with "MSH" or "<?xml" or "FHS". I've put together the following BASH script, but it's erroring out:
for filename in $(find /var/log/test... (2 Replies)
Hi everybody,
I am new at Unix/Bourne shell scripting and with my youngest experiences, I will not become very old with it :o
My code:
#!/bin/sh
set -e
set -u
export IFS=
optl="Optl"
LOCSTORCLI="/opt/lsi/storcli/storcli"
($LOCSTORCLI /c0 /vall show | grep RAID | cut -d " "... (5 Replies)
Hello.
System : opensuse leap 42.3
I have a bash script that build a text file.
I would like the last command doing :
print_cmd -o page-left=43 -o page-right=22 -o page-top=28 -o page-bottom=43 -o font=LatinModernMono12:regular:9 some_file.txt
where :
print_cmd ::= some printing... (1 Reply)
Discussion started by: jcdole
1 Replies
LEARN ABOUT CENTOS
expr
EXPR(1) User Commands EXPR(1)NAME
expr - evaluate expressions
SYNOPSIS
expr EXPRESSION
expr OPTION
DESCRIPTION --help display this help and exit
--version
output version information and exit
Print the value of EXPRESSION to standard output. A blank line below separates increasing precedence groups. EXPRESSION may be:
ARG1 | ARG2
ARG1 if it is neither null nor 0, otherwise ARG2
ARG1 & ARG2
ARG1 if neither argument is null or 0, otherwise 0
ARG1 < ARG2
ARG1 is less than ARG2
ARG1 <= ARG2
ARG1 is less than or equal to ARG2
ARG1 = ARG2
ARG1 is equal to ARG2
ARG1 != ARG2
ARG1 is unequal to ARG2
ARG1 >= ARG2
ARG1 is greater than or equal to ARG2
ARG1 > ARG2
ARG1 is greater than ARG2
ARG1 + ARG2
arithmetic sum of ARG1 and ARG2
ARG1 - ARG2
arithmetic difference of ARG1 and ARG2
ARG1 * ARG2
arithmetic product of ARG1 and ARG2
ARG1 / ARG2
arithmetic quotient of ARG1 divided by ARG2
ARG1 % ARG2
arithmetic remainder of ARG1 divided by ARG2
STRING : REGEXP
anchored pattern match of REGEXP in STRING
match STRING REGEXP
same as STRING : REGEXP
substr STRING POS LENGTH
substring of STRING, POS counted from 1
index STRING CHARS
index in STRING where any CHARS is found, or 0
length STRING
length of STRING
+ TOKEN
interpret TOKEN as a string, even if it is a
keyword like 'match' or an operator like '/'
( EXPRESSION )
value of EXPRESSION
Beware that many operators need to be escaped or quoted for shells. Comparisons are arithmetic if both ARGs are numbers, else lexicograph-
ical. Pattern matches return the string matched between ( and ) or null; if ( and ) are not used, they return the number of characters
matched or 0.
Exit status is 0 if EXPRESSION is neither null nor 0, 1 if EXPRESSION is null or 0, 2 if EXPRESSION is syntactically invalid, and 3 if an
error occurred.
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report expr translation bugs to <http://translationproject.org/team/>
AUTHOR
Written by Mike Parker, James Youngman, and Paul Eggert.
COPYRIGHT
Copyright (C) 2013 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
The full documentation for expr is maintained as a Texinfo manual. If the info and expr programs are properly installed at your site, the
command
info coreutils 'expr invocation'
should give you access to the complete manual.
GNU coreutils 8.22 June 2014 EXPR(1)