Whats the meaning of this code Post: 302068672

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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...

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nohup

nohup(1)						      General Commands Manual							  nohup(1)

NAME

       nohup - run a command immune to hangups

SYNOPSIS

       command [arguments]

DESCRIPTION

       executes command with hangups and quits ignored.  If output is not redirected by the user, both standard output and standard error are sent
       to If is not writable in the current directory, output is redirected to otherwise, fails. If a file is created, the file's permission  bits
       will be set to

       If output from is redirected to a terminal, or is not redirected at all, the output is sent to

EXTERNAL INFLUENCES

   Environment Variables
       determines the language in which messages are displayed.

       If is not specified in the environment or is set to the empty string, the value of is used as a default for each unspecified or empty vari-
       able.  If is not specified or is set to the empty string, a default of "C" (see lang(5)) is used instead of

       If any internationalization variable contains an invalid setting, behaves as if all internationalization variables are  set  to	"C".   See
       environ(5).

   International Code Set Support
       Single- and multi-byte character code sets are supported.

EXAMPLES

       It  is  frequently desirable to apply to pipelines or lists of commands.  This can be done only by placing pipelines and command lists in a
       single file, called a shell script.  To run the script using

       features apply to the entire contents of file.  If the shell script file is to be executed often, the need to type  can	be  eliminated	by
       setting execute permission on file.  The script can also be run in the background with interrupts ignored (see sh(1)):

       file  typically	contains  normal keyboard command sequences that one would want to continue running in case the terminal disconnects, such
       as:

WARNINGS

       Be careful to place punctuation properly.  For example, in the command form:

       applies only to command1.  To correct the problem, use the command form:

       Be careful of where standard error is redirected.  The following command may put error messages on tape, making it unreadable:

       whereas

       puts the error messages into file

EXIT STATUS

       The following exit values are returned:

	      The command specified by
			command was found but could not be invoked

	      An error occurred in the nohup utility or the specified
			command could not be found

	      Otherwise, the exit status of nohup will be that of the command specified.

SEE ALSO

       chmod(1), nice(1), sh(1), signal(5).

STANDARDS CONFORMANCE

																	  nohup(1)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting