Frequently Asked Questions About Linux / UNIX » date command 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 / Unix: Sed Substitute Multiple Patterns [ Find & Replace ]http://www.cyberciti.biz/faq/howto-sed-substitute-find-replace-multiple-patterns/ http://www.cyberciti.biz/faq/howto-sed-substitute-find-replace-multiple-patterns/#comments Fri, 20 Jan 2012 10:58:16 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=11420 I'm using the date +'%D_%T' to store Unix system date and time in a shell variable called $_now:
_now="$(date +'%D_%T')" echo $_now Outputs: 01/20/12_16:10:42
I'd like to replace / and : with _. I'm aware of the following sed command:
sed 's/\//_/g > s/:/_/g' <<<"$_now" Outputs: 01_20_12_16_14_09
How do I specify two pattern within the same sed command to replace | and : with _ so that I can get output as 01_20_12_16_10_42?]]> http://www.cyberciti.biz/faq/howto-sed-substitute-find-replace-multiple-patterns/feed/ 1 HowTo: UNIX Set Date and Time Commandhttp://www.cyberciti.biz/faq/unix-set-date-command/ http://www.cyberciti.biz/faq/unix-set-date-command/#comments Tue, 26 Apr 2011 22:16:09 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=10466 I recently noticed that one of my UNIX servers was about 4 hours behind the correct time. I wanted to correct the date and time manually. How do I set date and/or time under UNIX operating systems using command line options?]]> http://www.cyberciti.biz/faq/unix-set-date-command/feed/ 3 UNIX / Linux: Increment The Datehttp://www.cyberciti.biz/faq/increment-the-date/ http://www.cyberciti.biz/faq/increment-the-date/#comments Tue, 26 Apr 2011 21:16:27 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=10450 I want to increment the date under UNIX or Linux operating system while writing shell scripts. For example Apr/27/2011 should be incremented as Apr/28/2011 and so on. How do I increment a date in UNIX or Linux shell?]]> http://www.cyberciti.biz/faq/increment-the-date/feed/ 1 Linux: Bash Get Timehttp://www.cyberciti.biz/faq/unix-linux-bash-get-time/ http://www.cyberciti.biz/faq/unix-linux-bash-get-time/#comments Wed, 27 Oct 2010 11:25:23 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=9159 How do I get the system time in BASH? How can I get the Linux system using bash shell?]]> http://www.cyberciti.biz/faq/unix-linux-bash-get-time/feed/ 1 Append Current Date To Filename in Bash Shellhttp://www.cyberciti.biz/faq/unix-linux-appleosx-bsd-shell-appending-date-to-filename/ http://www.cyberciti.biz/faq/unix-linux-appleosx-bsd-shell-appending-date-to-filename/#comments Mon, 26 Apr 2010 21:32:06 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=10460 How do I append current date (mm_dd_yyyy format) to a filename (e.g., backup_mm_dd_yyyy.sql) under UNIX like operating systems?]]> http://www.cyberciti.biz/faq/unix-linux-appleosx-bsd-shell-appending-date-to-filename/feed/ 0 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 Bash: Display Current Datehttp://www.cyberciti.biz/faq/bash-current-date/ http://www.cyberciti.biz/faq/bash-current-date/#comments Sun, 06 Dec 2009 21:35:48 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=9530 How do I display the current date under Bash UNIX / Linux / OS X shell?]]> http://www.cyberciti.biz/faq/bash-current-date/feed/ 0 HowTo: Get Current Time In Shell Scripthttp://www.cyberciti.biz/faq/how-to-read-time-in-shell-script/ http://www.cyberciti.biz/faq/how-to-read-time-in-shell-script/#comments Mon, 25 May 2009 21:30:52 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=7508 How do I get current server time in shell script?]]> http://www.cyberciti.biz/faq/how-to-read-time-in-shell-script/feed/ 0 UNIX Date Command Exampleshttp://www.cyberciti.biz/faq/unix-date-command-howto-see-set-date-time/ http://www.cyberciti.biz/faq/unix-date-command-howto-see-set-date-time/#comments Tue, 27 Jan 2009 20:32:04 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=5579 How do I view and set date under UNIX operating systems?]]> http://www.cyberciti.biz/faq/unix-date-command-howto-see-set-date-time/feed/ 9 Display Date And Time In Linuxhttp://www.cyberciti.biz/faq/linux-display-date-and-time/ http://www.cyberciti.biz/faq/linux-display-date-and-time/#comments Wed, 07 Jan 2009 17:09:21 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=5696 How do I display date and time in Linux using command line and GUI options?]]> http://www.cyberciti.biz/faq/linux-display-date-and-time/feed/ 0 Find and Delete File If It Is More Than One Hour Old in UNIX Shellhttp://www.cyberciti.biz/faq/find-file-modification-time/ http://www.cyberciti.biz/faq/find-file-modification-time/#comments Sun, 20 Apr 2008 11:43:30 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=1027 http://www.cyberciti.biz/faq/find-file-modification-time/feed/ 2 OpenBSD Set Date and Timehttp://www.cyberciti.biz/faq/openbsd-set-date-and-time/ http://www.cyberciti.biz/faq/openbsd-set-date-and-time/#comments Thu, 03 Apr 2008 10:32:37 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=1040 yyyy - Year => mm - Month => dd - Day => HHSS - Hour Second in 24 clock format WARNING! These [...]]]> http://www.cyberciti.biz/faq/openbsd-set-date-and-time/feed/ 0 Linux / UNIX: displays a calendar and the date of easter with cal commandhttp://www.cyberciti.biz/faq/howto-displays-calendar-date-of-easter/ http://www.cyberciti.biz/faq/howto-displays-calendar-date-of-easter/#comments Wed, 01 Aug 2007 12:15:22 +0000 Vivek Gite http://www.cyberciti.biz/faq/howto-displays-calendar-date-of-easter/ http://www.cyberciti.biz/faq/howto-displays-calendar-date-of-easter/feed/ 2 Linux Set Date and Time From a Command Prompthttp://www.cyberciti.biz/faq/howto-set-date-time-from-linux-command-prompt/ http://www.cyberciti.biz/faq/howto-set-date-time-from-linux-command-prompt/#comments Mon, 02 Oct 2006 18:21:40 +0000 Vivek Gite http://www.cyberciti.biz/faq/howto-set-date-time-from-linux-command-prompt/ How can I set the system date and time from the command prompt (bash shell)? I don't have GUI installed and I am login over ssh session. How can I set date under Linux operating systems?]]> http://www.cyberciti.biz/faq/howto-set-date-time-from-linux-command-prompt/feed/ 80