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Full Discussion: A nice way to check a string
Top Forums Shell Programming and Scripting A nice way to check a string Post 302592502 by frappa on Tuesday 24th of January 2012 04:53:53 AM
Old 01-24-2012
hi, try:
Code:
if [  -z $LDN_MEDIA_SERVER_HOST ] ; then
[...]

-z tests if the string length is zero

see ya
fra
 

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NICE(1) 							   User Commands							   NICE(1)

NAME
nice - run a program with modified scheduling priority SYNOPSIS
nice [OPTION] [COMMAND [ARG]...] DESCRIPTION
Run COMMAND with an adjusted niceness, which affects process scheduling. With no COMMAND, print the current niceness. Niceness values range from -20 (most favorable to the process) to 19 (least favorable to the process). Mandatory arguments to long options are mandatory for short options too. -n, --adjustment=N add integer N to the niceness (default 10) --help display this help and exit --version output version information and exit NOTE: your shell may have its own version of nice, which usually supersedes the version described here. Please refer to your shell's docu- mentation for details about the options it supports. AUTHOR
Written by David MacKenzie. REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report nice translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2017 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
nice(2), renice(1) Full documentation at: <http://www.gnu.org/software/coreutils/nice> or available locally via: info '(coreutils) nice invocation' GNU coreutils 8.28 January 2018 NICE(1)
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