Sponsored Content
Full Discussion: ":" operator???
Top Forums Shell Programming and Scripting ":" operator??? Post 302408326 by jlliagre on Monday 29th of March 2010 08:07:58 AM
Old 03-29-2010
It is the "null" shell builtin. It does nothing but unlike a comment "#", it processes redirections and expands parameters.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

awk returning "[: ==: unary operator expected"

Hi All, I am new to shell scripting and right now I am just limited to using the pre-written scripts. I am in to Infrastructure management where we use different scripts to get the information passed on to the monitoring tools. I am trying to use this script to get the information about the... (2 Replies)
Discussion started by: theamrit
2 Replies

2. Shell Programming and Scripting

if returns "unknown test operator"

Greetings, using ksh on Solaris, I am trying to identify the current version of a package installed on multiple servers using if statement in a precursor to upgrading. I have searched the forums and have found many hits, reviewed 3 pages and have tried the different variations noted there. Also... (3 Replies)
Discussion started by: 22blaze
3 Replies

3. Shell Programming and Scripting

How can I use a pipe operator in a variable: OPTION="| command"?

I have a string of commands I am piping some data through and I want to allow command line switches to select which commands are used. I want to do something like this: OPTION="| command3" command1 -a -b c.txt | command2 -d -e $OPTION >result.txt I want to do it that way because OPTION may be... (1 Reply)
Discussion started by: KenJackson
1 Replies

4. Shell Programming and Scripting

error "test: [-d: unary operator expected" very confused.

Im trying to check if a series of directory exists and if not create them, and am having issues. All the instances of test return with the error "test: #!/bin/bash location_Parent=~/Documents/sight_of_sound location_IMG=~/Documents/Sight_of_sound/IMG location_AUD=~/Documents/Sight_of_sound/AUD... (4 Replies)
Discussion started by: orionrush
4 Replies

5. Shell Programming and Scripting

cannot properly employ "or" operator in an if statement (bash)

Hi, I have a variable, $sername, and I would like to display this variable only if it *does not* contain either of these two tags: *DTI*FA* or *DIFF*FA*. I think the syntax for my 'or' operator is off. The variable $sername is continuously changing in an outer loop (not shown), but at the... (4 Replies)
Discussion started by: goodbenito
4 Replies

6. Shell Programming and Scripting

What "-a" operator means in "if" statement

Hi I am trying to figure out what the following line does, I work in ksh88: ] && LIST="$big $LIST" Not sure what "-a" means in that case. Thanks a lot for any advice -A (1 Reply)
Discussion started by: aoussenko
1 Replies

7. Shell Programming and Scripting

awk command to replace ";" with "|" and ""|" at diferent places in line of file

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)
Discussion started by: shis100
7 Replies

8. UNIX for Dummies Questions & Answers

"binary operator exected" problem

Hey guys/gals, Am having trouble getting an 'if statement' to play nice.. I am playing with a script and need 'if' to check whether "y" or "Y" has been entered and if not to exit. In previous scripts I was playing with there would normally be a Y and a N response possibility so each... (2 Replies)
Discussion started by: TAPE
2 Replies

9. Shell Programming and Scripting

perl's substitution operator "s" with file contents?

Please show me how to make substitution over the contents of a file in a perl script. In a perl script, the core part of substitution operation is s/FINDPATTERN/REPLACEPATTERN/g; However, I cannot figure out how to make the substitution occur over the contents of a file. The following... (3 Replies)
Discussion started by: LessNux
3 Replies

10. Shell Programming and Scripting

Bash script - Print an ascii file using specific font "Latin Modern Mono 12" "regular" "9"

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
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 variable assignment. This means that tilde substitution is performed after the = sign and word splitting and file name genera- tion 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 5.11 15 Apr 1994 times(1)
All times are GMT -4. The time now is 06:34 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy