How do I start, stop, or restart networking service under HP-UX, OpenBSD, AIX and other Unix like operating systems?
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I need to create a log file using the following format:

myapp_monday.log
myapp_tuesday.log
….
…
myapp_sunday.log

How do I create log filename with day of the week in it under Linux or Unix operating systems?
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I‘m running the Mediawiki software under Apache web server running on the Unix operating systems. I’m getting the following in my php error log:

PHP Fatal error: Cannot redeclare wfProfileIn() (previously declared in /var/www/html/wiki/includes/profiler/Profiler.php:14) in /var/www/html/wiki/includes/ProfilerStub.php on line 25.

How do I fix this problem under Mediawiki version 1.18.0?
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How do I pass the referrer (HTTP referrer)as an HTTP header field using curl command under Linux OR Unix operating systems?
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How do I play files in random order using the mplayer command line player under Linux / Unix operating systems?
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How do I check ksh version? How do I find out ksh version under UNIX like operating systems?
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