Commands using date sorted by votes

Commands using date (199)

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Regex expand filenames to execute certain commands

file_to_backup{,-$(date +%F)} expands to the following two items: file_to_backup file_to_backup-$(date +%F) Show Sample Output

cp -a file_to_backup{,-$(date +%F)}

scriptmyjob · 2017-06-14 15:34:34 17

Set the date on one remove server to the date of another remote server

From a local node, retrieve the date from server A and set that time on server B. When ntpd is not an option and you need to get closest clock sync between two nodes Replace SRC_SRV with yout source server and DST_SRV with your destination server. You must have ssh access to both and sudo access to the the destination to set the date. Show Sample Output
This is sample output - yours may be different.
```
Wed Sep  6 15:10:17 UTC 2017
Wed Sep  6 15:03:43 UTC 2017
Wed Sep  6 15:03:43 UTC 2017
```
0

env TERM="$(ssh SRC_SRV "date"):TERM" ssh -t DST_SRV 'TS=${TERM%:*}; TERM=${TERM##*:}; export TS; date ; sudo date -s "$TS"; date'

sector6 · 2017-09-06 15:28:26 21
Calculate days on which Friday the 13th occurs (inspired from the work of the user justsomeguy)

Removed grep and simplified if statement. -- Friday is the 5th day of the week, monday is the 1st. Output may be affected by locale. Show Sample Output
This is sample output - yours may be different.
```
2018-04-13 Friday the 13th
2018-07-13 Friday the 13th
2019-09-13 Friday the 13th
2019-12-13 Friday the 13th
2020-03-13 Friday the 13th
2020-11-13 Friday the 13th
2021-08-13 Friday the 13th
2022-05-13 Friday the 13th
2023-01-13 Friday the 13th
2023-10-13 Friday the 13th
2024-09-13 Friday the 13th
2024-12-13 Friday the 13th
2025-06-13 Friday the 13th
```
0

for i in {2018..2025}-{01..12}-13; do [[ $(date --date $i "+%u") == 5 ]] && echo "$i Friday the 13th"; done

cpqlinux · 2018-07-30 15:54:24 311
Find the median file modification time of files in a directory tree

I needed to get a feel for how "old" different websites were, based on their directories. Show Sample Output
This is sample output - yours may be different.
```
2006-05-20
```
-1

date -d "@$(find dir -type f -printf '%C@\n' | sort -n | sed -n "$(($(find dir -type f | wc -l)/2))p")" +%F

allengarvin · 2009-03-24 18:48:49 7
Bash function to see if the day ends in

The shell has perfectly adequate pattern matching for simple expressions. Show Sample Output
This is sample output - yours may be different.
```
ok
```
-1

function ends_in_y() { case $(date +%A) in *y ) true ;; * ) false ;; esac } ; ends_in_y && echo ok

unixmonkey9199 · 2010-04-06 22:18:52 3
manually set system date/time

date MMDDhhmmYYYY date MMDDhhmm # example 27.12.1975 08:00 date 122708001975 Show Sample Output
This is sample output - yours may be different.
```
xen1 ~ # date
Sat May 29 08:30:02 CEST 2010
xen1 ~ # date 122708001975
Sat Dec 27 08:00:00 CET 1975
xen1 ~ # date
Sat Dec 27 08:00:01 CET 1975
```
-1

date MMDDhhmmYYYY

christian773 · 2010-05-29 08:26:13 3
View the newest xkcd comic.

Just added view with the eog viewer.
This is sample output - yours may be different.
-1

wget -O xkcd_$(date +%y-%m-%d).png `lynx --dump http://xkcd.com/|grep png`; eog xkcd_$(date +%y-%m-%d).png

theanalyst · 2010-10-27 13:42:55 3
Compressed Backup of the /etc

Simple Compressed Backup of the /etc Linux compatible
This is sample output - yours may be different.
-1

tar jcpf /home/[usuario]/etc-$(hostname)-backup-$(date +%Y%m%d-%H%M%S).tar.bz2 /etc

mack · 2011-04-29 22:53:11 4
Show seconds since modified of newest modified file in directory
This is sample output - yours may be different.
-1

echo $(( $( date +%s ) - $( stat -c %Y * | sort -nr | head -n 1 ) ))

depesz · 2011-05-12 14:29:45 3
Generat a Random MAC address

I liked vaporub's suggestion, here a little simplification of the sed command.
This is sample output - yours may be different.
-1

MAC=$((date +'%Y%m%d%H%M%S%N'; cat /proc/interrupts) | md5sum | sed -r 's/(..)/\1:/g' | cut -d: -f 1-6)

jazznjam · 2011-07-14 13:11:50 3
measure answer time of a web service

This uses curl to find out the access times of a web service Show Sample Output
This is sample output - yours may be different.
```
1. 13:54:15: real 0m0.393s
2. 13:54:21: real 0m0.053s
3. 13:54:28: real 0m0.678s
4. 13:54:34: real 0m0.166s
....
40. ...
```
-1

for i in {1..40};do echo -n $i. $(date +%H:%M:%S):\ ; (time curl 'http://ya.ru/' &> /dev/null) 2>&1|grep real;sleep 1;done

AntonyC · 2011-11-11 10:40:38 3
Countdown Clock

I find the other timers are inaccurate. It takes some microseconds to perform the date function. Therefore, using date/time math to calculate the time for us results in millisecond accuracy. This is tailored to the BusyBox date function. May need to change things around for GNU date function. Show Sample Output
This is sample output - yours may be different.
```
00:03:00
```
-1

let T=$(date +%s)+3*60;while [ $(date +%s) -le $T ]; do let i=$T-$(date +%s); echo -ne "\r$(date -d"0:0:$i" +%H:%M:%S)"; sleep 0.3; done

davidk · 2019-10-22 15:04:21 141
set the time of system
This is sample output - yours may be different.
-2

sudo date mmddhhxxyyyy

unixmonkey529 · 2009-02-10 08:26:12 10
Script para hacer un acopia d ela base de datos mysql

Tres lineas en un shell script para copiar la base de datos diaramente
This is sample output - yours may be different.
-2

FECHA=$(date +"%F") FINAL="$FECHA.sql.gz" mysqldump -h localhost -u user --password="pass" --opt jdiaz61_lupajuridica | gzip > /home/jdiaz61/www/backup/$FINAL

juancabo · 2009-08-09 14:51:46 5
big countdown clock with hours, minutes and seconds

Change HH:MM with your target time. This is for a Debian/Ubuntu GNU system. You need bash (package bash), date (package coreutils) and toilet (package toilet). Install with: # apt-get install bash coreutils toilet toilet-fonts
This is sample output - yours may be different.
-2

watch -tn1 'date -u +%T -d @$(expr $(date -d HH:MM +%s) - $(date +%s)) | toilet -f bigmono12'

prayer · 2010-06-26 11:56:11 3
jump to home dir and list all, not older than 3 days, with full-path, hidden/non-hidden files/subdirectories

Number of days back: change/append arbitrary amount of '\|'$[$(date +%Y%j)-x] expressions or specify any n-th day before today for a single day (you have to replace x with 3, 4, 5, whatever ... above I replaced it with 1 and 2 to get listing for yesterday and day before yesterday and 0 for today was not necessary, so left out). Q: How to narrow to *.pdf , *.png, *.jpg, *.txt, *.doc, *.sh or any type of files only? A: Pipe to grep at the end of command. Even shorter: cd && day=3;for a in $(seq $day -1 0);do tree -aicfnF --timefmt %Y%j-%d-%b-%y|grep $[$(date +%Y%j)-$a];done Here it's only needed to change amount of variable day to list period of days back - here is set to three days back (the seq command is adjusted for listing the oldest stuff first). Show Sample Output
This is sample output - yours may be different.
```
[2019215-03-Aug-19]  ./.config/session/
[2019215-03-Aug-19]  ./.config/session/konsole_2b5b0f704-9942-428b-a3d8-8054efd32b18_1564837706_57870
[2019215-03-Aug-19]  ./.config/session/konsole_23e1f9567-a8ff-42ad-a879-76f7bafb56c3_1564840981_89854
[2019215-03-Aug-19]  ./.config/session/konsole_2e2aea661-fd41-4510-b0b9-1d2c69ef99c7_1564864156_611707
[2019215-03-Aug-19]  ./.config/konsolerc
[2019216-04-Aug-19]  ./.config/dconf/
[2019216-04-Aug-19]  ./.config/dconf/user
[2019216-04-Aug-19]  ./.config/briši_me.pdf
```
-2

cd && tree -aicfnF --timefmt %Y%j-%d-%b-%y|grep $(date +%Y%j)'\|'$[$(date +%Y%j)-1]'\|'$[$(date +%Y%j)-2]

knoppix5 · 2019-08-04 02:22:24 61
LIST FILENAMES OF FILES CREATED TODAY IN CURRENT DIRECTORY
This is sample output - yours may be different.
-3

ls -la | grep $(date +%Y-%m-%d) | egrep -v -e '\.{1,2}' | sed "s/.*\:[0-9]\{2\} $.\+$$/\\1/g"

cicatriz · 2010-07-29 14:37:51 3
Backup a file with a date-time stamp

This backup function preserve the file suffix allowing zsh suffix aliases and desktop default actions to work with the backup file too. Show Sample Output
This is sample output - yours may be different.
```
> ls
image.jpg

> buf image.jpg; ls
image.2010-12-14.jpg
```
-3

buf () {oldname=$1; if [ "$oldname" != "" ]; then datepart=$(date +%Y-%m-%d); firstpart=`echo $oldname | cut -d "." -f 1`; newname=`echo $oldname | sed s/$firstpart/$firstpart.$datepart/`; cp -i ${oldname} ${newname}; fi }

Seebi · 2010-12-14 19:58:34 4
Press enter and take a WebCam picture.

Take a picture from your webcam and save it to a jpeg. A very slightly modified version of MarxBro's command.
This is sample output - yours may be different.
-3

-y -r 1 -t 3 -f video4linux2 -vframes 1 -s sxga -i /dev/video0 ~/webcam-$(date +%m_%d_%Y_%H_%M).jpeg

navyjeff · 2013-02-27 05:32:03 4
Calculate the the last day of a month +/- from current month

This produces a parseable output of the last day of the month in future or past. Change the '-v-0m' to be a month plus or minus from the current system time. Show Sample Output
This is sample output - yours may be different.
```
:~ date  -j -v1d -v-0m -v-1d +'%m %d %Y'
02 28 2010
:~ 
```
-4

date -j -v1d -v-0m -v-1d +'%m %d %Y'

drewk · 2010-03-04 17:47:51 6
Generate a random password 32 characters long :)
This is sample output - yours may be different.
-5

date | md5sum

yababay · 2010-09-28 20:20:17 4
Convert HH:MM:SS into seconds
This is sample output - yours may be different.
-5

TZ=GMT date -d "1970/01/01 00:29:36" +%s

linuts · 2011-11-01 13:06:00 3
Convert HH:MM:SS into seconds

uses the -u switch for UTC Another way could be echo $(($(date -ud "00:29:36" +%s)%86400))
This is sample output - yours may be different.
-5

date -ud "1970/01/01 00:29:36" +%s

frans · 2011-11-01 17:02:46 79
The end of time

The end of unix time and the 32bit era will be Tue Jan 19 03:14:07 UTC 2038 . date -ud @$[2**31] date: invalid date `@2147483648' . In 64bit you have much longer, at least to: date -ud @$[2**55] Sun Jun 13 06:26:08 UTC 1141709097 Show Sample Output
This is sample output - yours may be different.
```
Tue Jan 19 03:14:07 UTC 2038
```
-149

date -ud @$[2**31-1]

Escher · 2009-09-11 08:48:50 8
‹ First < 6 7 8

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Quickly batch resize images

-geometry (preserves values of height and width given, and aspect ratio). WARNING: While 'resize' creates resized copies of original files, 'mogrify' works on the original files, replacing them. It will overwrite the source files, use with caution, and backup regularly.

Grab the top 5 CLFUContest one-liners

New command with the last argument of the previous command.

Take screenshots with imagemagick

Merge *.pdf files

Merge all pdf files in the directory into one pdf file (the out.pdf file)

bash alias for sdiff: differ

this is just okey

run command on a group of nodes in parallel

Parallel is from https://savannah.nongnu.org/projects/parallel/ Other examples would be: (echo foss.org.my; echo www.debian.org; echo www.freenetproject.org) | parallel traceroute seq -f %04g 0 9999 | parallel -X rm pict{}.jpg

Show a random oneliner from commandlinefu.com

This will parse a random command json entry from http://commandlinefu.com A must have in your .bash_profile to learn new shell goodies at login!!!

Compress a series of png pictures to an avi movie.

cd /path/to/your/png_pics mencoder "mf://*.png" -mf fps=2 -o output.avi -ovc lavc -lavcopts vcodec=mpeg4 then you can get a movie named output.avi.

A child process which survives the parent's death (for sure)

Test scenario: * Open xterm (or konsole, ...) * Start xeyes with: ( xeyes & ) * Close the xterminal The xeyes process should be still running.

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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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