Date: Difference between revisions

From NovaOrdis Knowledge Base
Jump to navigation Jump to search
 
(16 intermediate revisions by the same user not shown)
Line 4: Line 4:
=Internal=
=Internal=
* [[Linux#Commands|Linux Commands]]
* [[Linux#Commands|Linux Commands]]
* [[gdate]]


=Overview=
=Overview=


<pre>
<syntaxhighlight lang='bash'>
date +'%m/%d/%y %H:%M:%S'
date +'%m/%d/%y %H:%M:%S'
</pre>
</syntaxhighlight>


Output:
Output:


<pre>
03/07/11 16:07:17
03/07/11 16:07:17
 
</pre>
Double quotes also work:
 
<syntaxhighlight lang='bash'>
date +"%m/%d/%y %H:%M:%S"
</syntaxhighlight>
 
This also works:
 
<syntaxhighlight lang='bash'>
date "+%m/%d/%y %H:%M:%S"
</syntaxhighlight>
 
=Output Patterns=
 
%s seconds since epoch (?)
 
==Time Zone==
 
+%z
 
-0700


=AM/PM=
=AM/PM=
Line 28: Line 49:


Long year (2014) %Y
Long year (2014) %Y
=Month=
%m
=Hour=
24-hour hour: %H
=Displaying Date in a Different Timezone=
Configure the desired timezone by setting up the TZ environment variable:
<syntaxhighlight lang='bash'>
TZ="America/Los_Angeles"
</syntaxhighlight>
To list available timezones, either list files in /usr/share/zoneinfo or run:
<syntaxhighlight lang='bash'>
timedatectl list-timezones
</syntaxhighlight>


=File Name Format=
=File Name Format=


<pre>
date +'%y.%m.%d-%H.%M.%S'
date +'%y.%m.%d-%H.%M.%S'
 
</pre>
or
 
date +'%Y.%m.%d'


=Setting Date and Time=
=Setting Date and Time=
Line 42: Line 86:


sets the date for 08/31 current year, time 16:50.
sets the date for 08/31 current year, time 16:50.
=Getting the Time in Seconds=
date '+%s'


=Elapsed Time in Seconds=
=Elapsed Time in Seconds=


Also see https://home.feodorov.com:9443/wiki/Wiki.jsp?page=Expr
<syntaxhighlight lang='bash'>
local t0 t1 elapsed
t0=$(date '+%s')
sleep 2
t1=$(date '+%s')
elapsed=$(("${t1}"-"${t0}"))
echo "elapsed seconds: ${elapsed}"
</syntaxhighlight>
 
=ISO 8601 Format=
 
date "+%Y-%m-%dT%H:%M:%S%z"
 
Also see: {{Internal|Gdate#ISO_8601_Date_Format|gdate ISO 8601 Format}}

Latest revision as of 21:05, 15 March 2024

External

Internal

Overview

date +'%m/%d/%y %H:%M:%S'

Output:

03/07/11 16:07:17

Double quotes also work:

date +"%m/%d/%y %H:%M:%S"

This also works:

date "+%m/%d/%y %H:%M:%S"

Output Patterns

%s seconds since epoch (?)

Time Zone

+%z
-0700

AM/PM

date +'%m/%d/%y %I:%M:%S %p'

Year

Short year (14) %y

Long year (2014) %Y

Month

%m

Hour

24-hour hour: %H

Displaying Date in a Different Timezone

Configure the desired timezone by setting up the TZ environment variable:

TZ="America/Los_Angeles"

To list available timezones, either list files in /usr/share/zoneinfo or run:

timedatectl list-timezones

File Name Format

date +'%y.%m.%d-%H.%M.%S'

or

date +'%Y.%m.%d'

Setting Date and Time

date 08311650

sets the date for 08/31 current year, time 16:50.

Getting the Time in Seconds

date '+%s'

Elapsed Time in Seconds

local t0 t1 elapsed
t0=$(date '+%s')
sleep 2
t1=$(date '+%s')
elapsed=$(("${t1}"-"${t0}"))
echo "elapsed seconds: ${elapsed}"

ISO 8601 Format

date "+%Y-%m-%dT%H:%M:%S%z"

Also see:

gdate ISO 8601 Format