Commands using date sorted by votes

Commands using date (199)

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Perpetual calendar

Gets any date since today. Other examples of recognized expressions are "2 years 4 days ago", "7 months" (in the future), "next Sunday", "yesterday", "tomorrow", etc.
This is sample output - yours may be different.
1

date --date="90 days ago"

dan · 2012-03-07 07:49:27 3
List the most recent dates in reverse-chronological order
This is sample output - yours may be different.
1

seq 1 5 | xargs -I"#" date --date="today -# days" +'%Y-%m-%d'

happycat · 2012-05-22 14:22:04 12
Print the current time on the whole screen, updated every second

http://www.joachim-breitner.de/projects#screen-message now also supports reading stdin continuously to update what it shows, different ?slides? separated by a form feed character. Here, we feed the current time into it each second to create a large clock.
This is sample output - yours may be different.
1

while(true); do printf "%s\f" $(date +%T); sleep 1; done | sm -

claudius · 2013-01-14 17:13:34 6
Get DELL Warranty Information from support.dell.com

pretty much the same. I use awk rather than grep and perl. It looks like the URL has been updated. The service tag can also be retrieved via snmp - potential for a for loop over a list of servers. I might have a look into doing an example. Show Sample Output
This is sample output - yours may be different.
```
M6400       Next Business Day Warranty with an end date of 10/2/2012.
```
1

curl -sL http://www.dell.com/support/troubleshooting/us/en/555/Servicetag/$(dmidecode -s system-serial-number) | html2text -style pretty | awk -F\. '/with an end date of/ { print $1 "."}'

mhollick · 2013-07-30 14:46:12 9
A bash timer

Starts and shows a timer. banner command is a part of the sysvbanner package. Instead of the banner an echo or figlet commands could be used. Stop the timer with Ctrl-C and elapsed time will be shown as the result. Show Sample Output
This is sample output - yours may be different.
```
  ###     ###             ###    #####           #####  #
 #   #   #   #           #   #  #     #         #     # #    #
# #   # # #   #         # #   #       #               # #    #
#  #  # #  #  #         #  #  #  #####           #####  #######
#   # # #   # #   ###   #   # # #         ###         #      #
 #   #   #   #    ###    #   #  #         ###   #     #      #
  ###     ###     ###     ###   #######   ###    #####       #
```
1

alias timer='export ts=$(date +%s);p='\''$(date -u -d @"$(($(date +%s)-$ts))" +"%H.%M.%S")'\'';watch -n 1 -t banner $p;eval "echo $p"'

ichbins · 2013-08-24 16:18:45 13
List the most recent dates in reverse-chronological order

bash brace expansion, sequence expression Show Sample Output
This is sample output - yours may be different.
```
2014-07-21
2014-07-20
2014-07-19
2014-07-18
2014-07-17
```
1

echo {-1..-5}days | xargs -n1 date +"%Y-%m-%d" -d

grault · 2014-07-22 17:56:07 8
convert unixtime to human-readable

Mac have direct conversion of seconds (Epoch time) Show Sample Output
This is sample output - yours may be different.
```
$ date -r 1345678901 
Thu Aug 23 01:41:41 CEST 2012
```
1

date -r 1390196676

MacMladen · 2014-09-24 10:33:16 8
Search replace with Ansible style timestamps

ls httpd.conf httpd.conf.2015-07-22@14:43:20
This is sample output - yours may be different.
1

sed -i.$(date +%F@%T) 's/^LogLevel warn/LogLevel debug/g' httpd.conf

zlemini · 2015-07-22 14:47:26 10
Should I be sleeping?
This is sample output - yours may be different.
1

[ $(date +"%H") -lt 7 ] && echo you should probably be sleeping...

cadejscroggins · 2015-09-19 08:14:57 11
Retrieve "last modified" timestamp of web resource in UTC seconds

This command line assumes that "${url}" is the URL of the web resource. It can be useful to check the "freshness" of a download URL before a GET request. Show Sample Output
This is sample output - yours may be different.
```
1464896240
```
1

curl --silent --head "${url}" | grep 'Last-Modified:' | cut -c 16- | date -f - +'%s'

oldo · 2016-06-02 22:20:55 11
Calculate days on which Friday the 13th occurs

Simply change the years listed in the first seq, and it will print out all the months in that span of years that have Friday the 13ths in them. Show Sample Output
This is sample output - yours may be different.
```
2010 -> August 
2011 -> May 
2012 -> January April July 
2013 -> September December 
2014 -> June 
2015 -> February March November 
2016 -> May 
2017 -> January October 
2018 -> April July 
```
1

for y in $(seq 1996 2018); do echo -n "$y -> "; for m in $(seq 1 12); do NDATE=$(date --date "$y-$m-13" +%A); if [ $NDATE == 'Friday' ]; then PRINTME=$(date --date "$y-$m-13" +%B);echo -n "$PRINTME "; fi; done; echo; done

suspenderguy · 2018-06-13 20:11:46 240
Calculate days on which Friday the 13th occurs

Alter the years in the first brace expansion to select your year range. Modify date format to your liking but leave " %w" at the end. Show Sample Output
This is sample output - yours may be different.
```
2018 April
2018 July
2019 September
2019 December
2020 March
2020 November
2021 August
2022 May
```
1

for i in {2018..2022}-{01..12}-13; do date --date $i +"%Y %B %w" | sed '/[^5]$/d; s/ 5*$//'; done

justsomeguy · 2018-07-09 15:47:39 246
generate random mac-address using md5sum + sed

Show Sample Output
This is sample output - yours may be different.
```
$ date | md5sum | sed -r 's/(..){3}/\1:/g;s/\s+-$//'
78:3a:dc:2a:9c:df
```
1

date | md5sum | sed -r 's/(..){3}/\1:/g;s/\s+-$//'

acavagni · 2019-07-13 10:39:21 37
Create backup copy of file, adding suffix of the date of the file modification (NOT today's date)
This is sample output - yours may be different.
1

cp file{,.$(date -d @$(stat -c '%Y' file) "+%y%m%d")}

rgawenda · 2019-09-09 11:49:28 110
Bash alias to output the current Swatch Internet Time

Output the current time in Swatch “Internet Time”, aka .beats. There are 1000 .beats in a day, and @0 is at 00:00 Central European Standard Time. This was briefly a thing in the late 1990s. More details: https://2020.swatch.com/en_ca/internet-time/ The alias is rather quote heavy to protect the subshell, so the bare command is: echo '@'$(TZ=GMT-1 date +'(%-S + %-M * 60 + %-H * 3600) / 86.4'|bc) Show Sample Output
This is sample output - yours may be different.
```
@811
```
1

alias beats='echo '\''@'\''$(TZ=GMT-1 date +'\''(%-S + %-M * 60 + %-H * 3600) / 86.4'\''|bc)'

scruss · 2021-05-27 18:42:21 191
Change date from MM/DD/YYYY to YYYY-MM-DD (mysql like)
This is sample output - yours may be different.
0

date -d 09/20/1981 +"%Y-%m-%d"

trunet · 2009-02-09 18:30:44 10
Set date and time
This is sample output - yours may be different.
0

sudo date -s "26 OCT 2008 19:30:00"

cinan · 2009-02-09 20:26:30 8
Name a backup/archive file based on current date and time
This is sample output - yours may be different.
0

archivefile=filename-$(date +%Y%m%d-%H%M).tar.gz

kmac · 2009-02-10 14:40:43 10
Say the current time (Mac OS X)

On other systems, replace 'say' with the name of another text-to-speech engine, e.g. espeak ( http://espeak.sourceforge.net ) or festival ( http://www.cstr.ed.ac.uk/projects/festival )
This is sample output - yours may be different.
0

date "+The time is %H:%M" | say

las3rjock · 2009-02-20 20:14:53 6
Generic date format

Useful to archive files once a day: cp file file.$(date --iso) Show Sample Output
This is sample output - yours may be different.
```
2009-02-26
```
0

date --iso

raphink · 2009-02-25 23:50:40 7
log your PC's motherboard and CPU temperature along with the current date

cat datemp.log 04/01/0902:11:42 Sys Temp: +11.0?C CPU Temp: +35.5?C AUX Temp: +3.0?C Show Sample Output
This is sample output - yours may be different.
```
logs the date, the machine?s motherboard and CPU temperature (assumes you have lm-sensors properly setup) and the voltage level of a certain rail in the power supply, and puts all of those in a file called datemp.log
```
0

date +%m/%d/%y%X|tr -d 'n' >>datemp.log&& sensors|grep +5V|cut -d "(" -f1|tr -d 'n'>> datemp.log && sensors |grep Temp |cut -d "(" -f1|tr -d 'n'>>datemp.log

f241vc15 · 2009-03-31 18:13:23 4
Number of seconds to certain unix date

Echos the number of seconds from the current time till the specified time (Example in command is (2**31-1)) aka the Unix epoch. Just replace that number with the specified date (in seconds past Jan. 1st 1970) and it will return the seconds. NOTE: Only works in bash Show Sample Output
This is sample output - yours may be different.
```
908835068
```
0

echo $( (( $( (2**31 -1) ) - $(date +%s) )) )

Chartreuse · 2009-04-02 05:14:23 7
get time in other timezones

prints out the time for the timezone specified in $offsetutc. So you have less to think about things like: "I'm in utc+4 and my friend in utc-7, can I call him now or will I wake him?" Note: $offsetutc should be an integer between -12 and 12. Show Sample Output
This is sample output - yours may be different.
```
utc:   Fri Aug  7 23:07:24 UTC 2009
utc+2: Sat Aug  8 01:07:24 UTC 2009
```
0

let utime=$offsetutc*3600+$(date --utc +%s)+3600; date --utc --date=@${utime}

flokra · 2009-08-07 23:12:14 3
list the last week's added files in xmms2's library
This is sample output - yours may be different.
0

xmms2 mlib search added \> $(echo $(date +%s) - 604800|bc)

unixmonkey6280 · 2009-09-20 04:00:37 4
StopWatch, OnScreen version, blinking shily on all desktops

Variation of the theme, this one blinks in low profile on top level of X, ie, it is visible, indeed small. Try changing fonts and sizes of osd_cat
This is sample output - yours may be different.
0

export I=$(date +%s); watch -t -n 1 'T=$(date +%s);E=$(($T-$I));hours=$((E / 3600)) ; seconds=$((E % 3600)) ; minutes=$((seconds / 60)) ; seconds=$((seconds % 60)) ; echo $(printf "%02d:%02d:%02d" $hours $minutes $seconds) | osd_cat -o 20 -d 1 -p bottom'

m33600 · 2009-10-23 07:47:11 3
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Pack up some files into a tarball on a remote server without writing to the local filesystem

I recently found myself with a filesystem I couldn't write to and a bunch of files I had to get the hell out of dodge, preferably not one at a time. This command makes it possible to pack a bunch of files into a single archive and write it to a remote server.

generate random password

-B flag = don't include characters that can be confused for other characters (this helps when you give someone their password for the first time so they don't cause a lockout with, for example, denyhosts or fail2ban) -s flag = make a "secure", or hard-to-crack password -y flag = include special characters (not used in the example because so many people hate it -- however I recommend it) "1 10" = output 1 password, make it 10 characters in length For even more secure passwords please use the -y flag to include special characters like so: $ pwgen -Bsy 10 1 output>> }&^Y?.>7Wu

Merge some PDF files into a single one

PRINT LINE the width of screen or specified using any char including Colors, Escapes and metachars

One of the first functions programmers learn is how to print a line. This is my 100% bash builtin function to do it, which makes it as optimal as a function can be. The COLUMNS environment variable is also set by bash (including bash resetting its value when you resize your term) so its very efficient. I like pretty-output in my shells and have experimented with several ways to output a line the width of the screen using a minimal amount of code. This is like version 9,000 lol. This function is what I use, though when using colors or other terminal features I create separate functions that call this one, since this is the lowest level type of function. It might be better named printl(), but since I use it so much it's more optimal to have the name contain less chars (both for my programming and for the internal workings). If you do use terminal escapes this will reset to default. $ tput sgr0 For implementation ideas, check my http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html

Installing debian on fedora (chrooted)

Increase SCT of external USB disk enclosure to one hour.

So I had this 2TB Seagate external disk/USB enclosure which by default would spin-down its internal drive (it enters a standby mode) after four minutes of inactivity.. Spinning-up the inactive drive was an annoying delay when accessing files and also it severely interfered with NFS.. SCT stands for "Standby Condition Timer". To completely disable SCT: $ sdparm --clear STANDBY -6 /dev/sdb To return to original (default) SCT settings: $ sdparm -D -p 0x1a -6 /dev/sdb To verify the settings (before and after): $ sdparm -a /dev/sdb No need for vendor-provided MSWIN tools, etc.

Calculate pi to an arbitrary number of decimal places

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

top svn committers (without awk)

list top committers (and number of their commits) of svn repository. in this example it counts revisions of current directory.

Get the date for the last Saturday of a given month

If your locale has Monday as the first day of the week, like mine in the UK, change the two $7 into $6

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Commands using date (199) the last day the last week the last month all time sorted by date votes

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Commands using date (199)

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