Whats the meaning of this code Post: 302068811

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1. Shell Programming and Scripting

Whats the meaning

What the folowing statements means and whats the use of it ? expr $db_name + 2 >/dev/null 2>&1 Thanks.

2. Shell Programming and Scripting

Hi Can anybody tell me what is the meaning of the following code? i=4 j=1 k=0 Specialy meaning of this line echo $? Specialy meaning of this line echo $? Specialy meaning of this line echo $? Thanks in advance Sas

3. Shell Programming and Scripting

whats wrong with this code

ls -ld | grep $1 /etc/passwd | cut -d: -f6 i need see the content...

4. Shell Programming and Scripting

##*_ - whats this?

Hi all, could you please tell me whats this stands ##*_ 0##*/ i knew this alone if some more is there please tell me that also.

5. Shell Programming and Scripting

can any one explain the meaning of the below code ?

while getopts :g:l:h: KEY $* do case $KEY in g) NAME=$OPTARG ;; l) LAB=$OPTARG ;; h) HD=$OPTARG ;; *) echo "Illegal option: $OPTARG" echo "$usage" exitStatus=1 exitGrace esac done

6. Shell Programming and Scripting

whats wrong in my code

Code: #!/usr/bin/perl -w use strict; use warnings; #Clears Screen $CLEAR=`clear`; print $CLEAR; i get the below error: Global symbol "$CLEAR" requires explicit package name at ./mutmg.pl line 6. Global symbol "$CLEAR" requires explicit package name at ./mutmg.pl line 7.

7. Shell Programming and Scripting

Whats wrong With This Code

Hi , iam new with sed command D:\bfx_db>sed -ne '/^SP2-*:/S/^\<.*\.*\>$/\2\p' reg.sql >>D:\out.log The filename, directory name, or volume label syntax is incorrect. Here my source file is reg.sql , i need the output in out.log Can anybody Help on this????

8. Shell Programming and Scripting

whats error in code ??

if `egrep -c "safe_mode" /usr/local/lib/php.ini` - gt 0 && " `egrep -c "safe_mode" /usr/local/lib/php.ini` = "On" " then echo " Good " exit else echo " Not Good "; fi and

9. Shell Programming and Scripting

Whats the meaning of set -e inside the script

Hi, I would like to ask about the meaning or purpose of set -e in the script bash, Does it mean if a wrong command in the script it will close or exit the script without continuation thats what happen if i set it in the terminal. Thanks in advance

10. Shell Programming and Scripting

What is the meaning of the following Perl Code?

Hi All Can any one please help me to understand the below Perl Code package Win32::File; # # File.pm # Written by Douglas_Lankshear@ActiveWare.com # # subsequent hacks: # Gurusamy Sarathy # $VERSION = '0.06'; require Exporter; require DynaLoader; @ISA= qw( Exporter...

LEARN ABOUT BSD

nice

NICE(1) 						      General Commands Manual							   NICE(1)

NAME

       nice, nohup - run a command at low priority (sh only)

SYNOPSIS

       nice [ -number ] command [ arguments ]

       nohup command [ arguments ]

DESCRIPTION

       Nice  executes  command	with low scheduling priority.  If the number argument is present, the priority is incremented (higher numbers mean
       lower priorities) by that amount up to a limit of 20.  The default number is 10.

       The super-user may run commands with priority higher than normal by using a negative priority, e.g. `--10'.

       Nohup executes command immune to hangup and terminate signals from the controlling terminal.  The priority  is  incremented  by	5.   Nohup
       should  be invoked from the shell with `&' in order to prevent it from responding to interrupts by or stealing the input from the next per-
       son who logs in on the same terminal.

FILES

       nohup.out standard output and standard error file under nohup

SEE ALSO

       csh(1), setpriority(2), renice(8)

DIAGNOSTICS

       Nice returns the exit status of the subject command.

BUGS

       Nice and nohup are particular to sh(1).	If you use csh(1), then commands executed with ``&'' are automatically immune  to  hangup  signals
       while  in  the  background.   There  is	a builtin command nohup which provides immunity from terminate, but it does not redirect output to
       nohup.out.

       Nice is built into csh(1) with a slightly different syntax than described here.	The form ``nice +10'' nices to positive nice,  and  ``nice
       -10'' can be used by the super-user to give a process more of the processor.

4th Berkeley Distribution					    May 8, 1986 							   NICE(1)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting