Frequently Asked Questions About Linux / UNIX » posix http://www.cyberciti.biz/faq Every answer asks a more beautiful question. Fri, 03 Feb 2012 22:38:32 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Linux: What is Dash ( /bin/dash ) Shell?http://www.cyberciti.biz/faq/debian-ubuntu-linux-binbash-vs-bindash-vs-binshshell/ http://www.cyberciti.biz/faq/debian-ubuntu-linux-binbash-vs-bindash-vs-binshshell/#comments Sat, 28 May 2011 12:43:18 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=10598 What is /bin/dash? I noticed that the default system shell /bin/sh was changed to /bin/dash. Why was this change made?]]> http://www.cyberciti.biz/faq/debian-ubuntu-linux-binbash-vs-bindash-vs-binshshell/feed/ 3 Linux / UNIX: TZ Environment Variablehttp://www.cyberciti.biz/faq/linux-unix-set-tz-environment-variable/ http://www.cyberciti.biz/faq/linux-unix-set-tz-environment-variable/#comments Sat, 29 Jan 2011 11:54:40 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=9863 What is the correct format for a TZ (time zone) environment variable for use with the Linux or UNIX operating system?]]> http://www.cyberciti.biz/faq/linux-unix-set-tz-environment-variable/feed/ 0 Linux / UNIX: Convert Epoch Seconds To the Current Timehttp://www.cyberciti.biz/faq/convert-epoch-seconds-to-the-current-time-date/ http://www.cyberciti.biz/faq/convert-epoch-seconds-to-the-current-time-date/#comments Tue, 16 Mar 2010 08:41:47 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=6829 How do I convert Epoch seconds to the current time under UNIX or Linux operating systems?]]> http://www.cyberciti.biz/faq/convert-epoch-seconds-to-the-current-time-date/feed/ 4 Linux Date Command: Convert Named Stats Dump Datehttp://www.cyberciti.biz/faq/bind-named-stats-dns-server-date/ http://www.cyberciti.biz/faq/bind-named-stats-dns-server-date/#comments Thu, 11 Mar 2010 10:54:45 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=6762 The rndc stats commands created /var/named/chroot/var/named/data/named_stats.txt file under RHEL 5.x or CentOS 5.x BIND 9 server. However, date is not is correct format. The date is in the following format:
grep 'Dump' /var/named/chroot/var/named/data/named_stats.txt
outputs:
+++ Statistics Dump +++ (1263408025)
--- Statistics Dump --- (1263408025)
+++ Statistics Dump +++ (1263408071)
--- Statistics Dump --- (1263408071)
+++ Statistics Dump +++ (1268304218)
--- Statistics Dump --- (1268304218)
+++ Statistics Dump +++ (1268304248)
--- Statistics Dump --- (1268304248)


How do I convert date (e.g., 1263408025) in a human readable format?]]> http://www.cyberciti.biz/faq/bind-named-stats-dns-server-date/feed/ 5 UNIX Get An Alert When Disk Is Fullhttp://www.cyberciti.biz/faq/mac-osx-unix-get-an-alert-when-my-disk-is-full/ http://www.cyberciti.biz/faq/mac-osx-unix-get-an-alert-when-my-disk-is-full/#comments Thu, 13 Aug 2009 08:03:00 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=4745 I want to get an alert when my disk is full under UNIX and Mac OS X? How do I set a a specified threshold and run the script via cron?]]> http://www.cyberciti.biz/faq/mac-osx-unix-get-an-alert-when-my-disk-is-full/feed/ 24 Warning: bad syntax, perhaps a bogus ‘-’? See /usr/share/doc/procps-3.2.7/FAQhttp://www.cyberciti.biz/faq/warning-bad-syntax-perhaps-a-bogus/ http://www.cyberciti.biz/faq/warning-bad-syntax-perhaps-a-bogus/#comments Wed, 14 Jan 2009 06:46:54 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=5352 I type the following command:
ps -auxf | sort -nr -k 4 | head -10
And I get the output along with warning message:
Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.7/FAQ

How do I fix this problem?]]> http://www.cyberciti.biz/faq/warning-bad-syntax-perhaps-a-bogus/feed/ 0 FreeBSD php5-posix-5.2.6 has known vulnerabilities error – Stop in /usr/ports/sysutils/php5-posix.http://www.cyberciti.biz/faq/freebsd-stop-in-usrportssysutilsphp5-posix-error/ http://www.cyberciti.biz/faq/freebsd-stop-in-usrportssysutilsphp5-posix-error/#comments Sat, 02 Aug 2008 19:08:41 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=1305 Q. When I run make install clean for php5-extensions port, I'm dumped with the following error:
=> Please update your ports tree and try again. *** Error code 1
Stop in /usr/ports/sysutils/php5-posix. *** Error code 1
How do I fix this problem?]]> http://www.cyberciti.biz/faq/freebsd-stop-in-usrportssysutilsphp5-posix-error/feed/ 0 Linux / UNIX killing a process and restarting the samehttp://www.cyberciti.biz/faq/howto-linux-unix-killing-restarting-the-process/ http://www.cyberciti.biz/faq/howto-linux-unix-killing-restarting-the-process/#comments Mon, 16 Jul 2007 18:44:50 +0000 Vivek Gite http://www.cyberciti.biz/faq/howto-linux-unix-killing-restarting-the-process/ http://www.cyberciti.biz/faq/howto-linux-unix-killing-restarting-the-process/feed/ 0 Understanding command line shellhttp://www.cyberciti.biz/faq/unix-linux-shell/ http://www.cyberciti.biz/faq/unix-linux-shell/#comments Thu, 30 Nov 2006 00:00:00 +0000 Vivek Gite http://www.cyberciti.biz/faq/unix-linux-shell/ http://www.cyberciti.biz/faq/unix-linux-shell/feed/ 2 Where is my Linux GNU C or gcc compiler installed?http://www.cyberciti.biz/faq/locate-linux-gnu-c-or-gcc-compiler-location/ http://www.cyberciti.biz/faq/locate-linux-gnu-c-or-gcc-compiler-location/#comments Tue, 14 Nov 2006 05:53:15 +0000 Vivek Gite http://www.cyberciti.biz/faq/locate-linux-gnu-c-or-gcc-compiler-location/ Q. Where is my GNU C compiler? Where does the GNU C (gcc) compiler reside in the CentOS Linux installation? How do I install if it is not installed by default? ]]> http://www.cyberciti.biz/faq/locate-linux-gnu-c-or-gcc-compiler-location/feed/ 8