Commands tagged date sorted by votes

Commands tagged date (119)

sorted by

Get the current epoch in base32
This is sample output - yours may be different.
0

obase=16; echo "$(date +%s)" | bc | xxd -r -p | base32

malathion · 2017-06-26 16:58:38 22
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 15:54:24 516
Add timestamp of photos created by the “predictive capture” feature of Sony's Xperia camera app at the beginning of the filename

The “predictive capture” feature of Sony's Xperia camera app hides the date stamp deeply inside the filename. This command adds another date stamp at the beginning of the filename. Show Sample Output
This is sample output - yours may be different.
```
'DSCPDC_0000_BURST20191215123205830.JPG' -> '2019-12-15 DSCPDC_0000_BURST20191215123205830.JPG'
'DSCPDC_0000_BURST20200119191047162.JPG' -> '2020-01-19 DSCPDC_0000_BURST20200119191047162.JPG'
```
0

(setopt CSH_NULL_GLOB; cd /path/to/Camera\ Uploads; for i in DSCPDC_000*; do mv -v $i "$(echo $i | perl -lpe 's/(DSCPDC_[0-9]{4}_BURST)([0-9]{4})([0-9]{2})([0-9]{2})/$2-$3-$4 $1$2$3$4/')"; done)

langec · 2020-04-12 06:20:59 229
Fix time-stamped filenames of JPEG images according to the EXIF date the photo was taken

For each *.jpg or *.JPG file in the current directory, extract the date the photo was taken from its EXIF metadata. Then replace the date stamp, which is assumed to exist in the filename, by the date the photo was taken. A trick from https://unix.stackexchange.com/a/9256 is used to split the date into its components. Show Sample Output
This is sample output - yours may be different.
```
'2020-04-12 DSC_0146.JPG' -> '2017-12-26 DSC_0146.JPG'
'2020-04-12 DSC_0147.JPG' -> '2017-12-28 DSC_0147.JPG'
```
0

(IFS=': '; for i in *.(#i)jpg; do set $(exiv2 -K 'Exif.Image.DateTime' -Pv $i 2> /dev/null); mv -v $i "$1-$2-$3${i#[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]}"; done)

langec · 2020-05-16 12:10:00 134
quick and easy way of validating a date format of yyyy-mm-dd and returning a boolean

Quick and easy way of validating a date format of yyyy-mm-dd and returning a boolean, the regex can easily be upgraded to handle "in betweens" for mm dd or to validate other types of strings, ex. ip address. Boolean output could easily be piped into a condition for a more complete one-liner.
This is sample output - yours may be different.
-1

echo 2006-10-10 | grep -c '^[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]$'

rez0r · 2009-05-11 22:18:43 7
ruby one-liner to get the current week number
This is sample output - yours may be different.
-1

ruby -e 'require "date"; puts DateTime.now.cweek'

imsaar · 2009-12-01 20:59:18 4
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 4
display IP addresses with 5 or more unsuccessful login attempts today

display IP's that unsuccessfully attempted to login 5 or more times today may want to filter any trusted IP's and the localhost useful for obtaining a list IP addresses to block on the firewall Show Sample Output
This is sample output - yours may be different.
```
the output is zero or more IP addresses
```
-1

lastb -i | grep "$(date '+%a %b %d')" | awk '{ print $3 }' | sort | uniq -c | awk '{ if ($1 >= 5) print $2; }'

forestb · 2015-11-20 07:19:20 10
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 15:04:21 384
Not so simple countdown from a given date

An improved version of http://www.commandlinefu.com/commands/view/1772/simple-countdown-from-a-given-date that uses Perl to pretty-print the output. Note that the GNU-style '--no-title' option has been replaced by its one-letter counterpart '-t'. Show Sample Output
This is sample output - yours may be different.
```
4d 23:15:43
```
-2

watch -tn1 'bc<<<"`date -d'\''friday 21:00'\'' +%s`-`date +%s`"|perl -ne'\''@p=gmtime($_);printf("%dd %02d:%02d:%02d\n",@p[7,2,1,0]);'\'

penpen · 2009-03-29 19:53:36 8
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 4
Get the date for the last Saturday of a given month

This is a little trickier than finding the last Sunday, because you know the last Sunday is in the first position of the last line. The trick is to use the NF less than or equal to 7 so it picks up all the lines then grep out any empty lines. Show Sample Output
This is sample output - yours may be different.
```
28
```
-2

cal 04 2012 | awk 'NF <= 7 { print $7 }' | grep -v "^$" | tail -1

javidjamae · 2012-05-03 16:57:45 767
Convert HH:MM:SS into seconds

Show Sample Output
This is sample output - yours may be different.
```
1776
```
-2

echo 00:29:36 | sed s/:/*60+/g | bc

debyatman · 2012-08-11 00:47:47 24
perl one-liner to get the current week number
This is sample output - yours may be different.
-3

perl -e 'use Date::Calc qw(Today Week_Number); $weekn = Week_Number(Today); print "$weekn\n"'

imsaar · 2009-12-01 20:56:13 4
Bash function to see if the day ends in "y"

For those days when you need to know if something is happening because the day ends in "y". Show Sample Output
This is sample output - yours may be different.
```
$ ends_in_y
1
```
-3

function ends_in_y() { if [ `date +%A | sed -e 's/$^.*$$.$$/\2/'` == "y" ]; then echo 1; else echo 0; fi }

allrightname · 2010-04-06 20:14:34 8
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 5
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 7
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 4
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 80
‹ First < 3 4 5

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

vi case insensitive search

Video Google download

Download google video with wget. Or, if you wish, pass video URL to ie mplayer to view as stream. 1. VURL: replace with url. I.e. http://video.google.com/videoplay?docid=12312312312312313# 2. OUPUT_FILE : optionally change to a more suited name. This is the downloaded file. I.e. foo.flv # Improvements greatly appreciated. (close to my first linux command after ls -A :) ) Breakedown pipe by pipe: 1. wget: html from google, pass to stdout 2. grep: get the video url until thumbnailUrl (not needed) 3. grep: Strip off everything before http:// 4. sed: urldecode 5. echo: hex escapes 6. sed: stipr of tailing before thumbnailUrl 7. wget: download. Here one could use i.e. mplayer or other...

find and delete empty dirs, start in current working dir

A quick way to find and delete empty dirs, it starts in the current working directory. If you do find . -empty -type d you will see what could be removed, or to a test run.

Add all files in current directory to SVN

The --force option bypasses the warning if files are already in SVN.

Add your public SSH key to a server in one command

Just run the command, type your password, and that's the last time you need to enter your password for that server. This assumes that the server supports publickey authentication. Also, the permissions on your home dir are 755, and the permissions on your .ssh dir are 700 (local and remote).

Boooted as EFI/UEFI or BIOS

view hex mode in vim

Print github url for the current url

Works for repos cloned via ssh or https.

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

list with full path

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)
» commands tagged date

Commands tagged date (119) the last day the last week the last month all time sorted by date votes

What's this?

Check These Out

Stay in the loop…

Commands tagged date (119)

sorted by