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 15:54:24 313
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 9
‹ First < 6 7 8

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Display error pages in report format

This command will return a full list of Error 404 pages in the given access log. The following variables have been given to awk Hostname ($2), ERROR Code ($9), Missing Item ($7), Referrer ($11) You can then send this into a file (>> /path/to/file), which you can open with OpenOffice as a CSV

Recursively lists all files in the current directory, except the ones in '.snapshot' directory

This can be useful for those who have mounted NetApp file-systems with snapshot activated.

Simulate typing

Provide the ten largest subfolders in the current folder

encode image to base64 and copy to clipboard

I use it for embedding images in CSS for Stylish, the Firefox addon. Thought it might be useful to others.

Look for English words in /dev/urandom

Little faster alternative.

View dmesg output in human readable format

Repeat a portrait eight times so it can be cut out from a 6"x4" photo and used for visa or passport photos

Yes, You could do it in the GIMP or even use Inkscape to auto-align the clones, but the command line is so much easier. NOTE: The +clone and -clone options are just to shorten the command line instead of typing the same filename eight times. It might also speed up the montage by only processing the image once, but I'm not sure. "+clone" duplicates the previous image, the following two "-clone"s duplicate the first two and then the first four images. NOTE2: The -frame option is just so that I have some lines to cut along. BUG: I haven't bothered to calculate the exact geometry (width and height) of each image since that was not critical for the visa photos I need. If it matters for you, it should be easy enough to set using the -geometry flag near the end of the command. For example, if you have your DPI set to 600, you could use "-geometry 800x1200!" to make each subimage 1⅓ x 2 inches. You may want to use ImageMagick's "-density 600" option to put a flag in the JPEG file cuing the printer that it is a 600 DPI image. BUG2: ImageMagick does not autorotate images based on the EXIF information. Since the portrait photo was taken with the camera sideways, I made the JPEG rotate using jhead like so: jhead -autorot 2007-08-25-3685.jpg

Convert the contents of a directory listing into a colon-separated environment variable

Useful for making a CLASSPATH out of a list of JAR files, for example. Also: export CLASSPATH=.:$(find ./lib -name '*.jar' -printf '%p:')

Binary injection

Replace (as opposed to insert) hex opcodes, data, breakpoints, etc. without opening a hex editor. HEXBYTES contains the hex you want to inject in ascii form (e.g. 31c0) OFFSET is the hex offset (e.g. 49cf) into the binary FILE

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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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