Real-time scenarios where VARIABLE SUBSTITUTION/EXPANSION is useful Post: 302946070

5 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

sed insert command and variable expansion/command substitution

I know this script is crummy, but I was just messing around.. how do I get sed's insert command to allow variable expansion to show the filename? #!/bin/bash filename=`echo $0` /usr/bin/sed '/#include/ { i\ the filename is `$filename` }' $1 exit 0

2. Shell Programming and Scripting

[Solved] Command Substitution and Variable Expansion within a Case

Hello All, I don't write scripts very often, and in this case I am stumped, although it may be a bug in the version of bash I have to use (it's not my system). I want to extract a specific string snippet from a block of text (coming from a log file) that is dependent on a bunch of other...

3. Shell Programming and Scripting

Shell script to convert epoch time to real time

Dear experts, I have an epoch time input file such as : - 1302451209564 1302483698948 1302485231072 1302490805383 1302519244700 1302492787481 1302505299145 1302506557022 1302532112140 1302501033105 1302511536485 1302512669550 I need the epoch time above to be converted into real...

4. Shell Programming and Scripting

Converting real time to epoch time

# date +%s -d "Mon Feb 11 02:26:04" 1360567564 # perl -e 'print scalar localtime(1360567564), "\n";' Mon Feb 11 02:26:04 2013 the epoch conversion is working fine. but one of my application needs 13 digit epoch time as input 1359453135154 rather than 10 digit epoch time 1360567564...

5. Shell Programming and Scripting

sed variable expansion fails for substitution in range

I'm trying to change "F" to "G" in lines after the first one: 'FUE.SER' 5 1 1 F0501 F0401 F0502 2 1 F0301 E0501 F0201 E0502 F0302 3 1 F0503 E0503 E0301 E0201 E0302 E0504 F0504 4 1 F0402 F0202 E0202 F0101 E0203 F0203 F0403 5 1 F0505 E0505 E0303 E0204 E0304 E0506...

LEARN ABOUT OPENDARWIN

times

times(1)							   User Commands							  times(1)

NAME

       times - shell built-in function to report time usages of the current shell

SYNOPSIS

   sh
       times

   ksh
       times

DESCRIPTION

   sh
       Print the accumulated user and system times for processes run from the shell.

   ksh
       Print the accumulated user and system times for the shell and for processes run from the shell.

       On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:

       1.  Variable assignment lists preceding the command remain in effect when the command completes.

       2.  I/O redirections are processed after variable assignments.

       3.  Errors cause a script that contains them to abort.

       4.  Words,  following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
	   able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation  are  not
	   performed.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ksh(1), sh(1), time(1), attributes(5)

SunOS 5.10							    15 Apr 1994 							  times(1)