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 20:11:46 235
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 15:47:39 241
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 18:42:21 188
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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Display command lines visible on commandlinefu.com homepage

Uses the fabulous Hpricot library to parse HTML from Ruby. Extracts all elements of "command' class and displays unescaped text from inside these elements. The following command can help install dependencies (apart from Ruby itself) $ gem sources -a http://gems.github.com && sudo gem install why-hpricot

Print the last modified file

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" }

Edit the /etc/sudoers config file the right way.

'visudo' is installed by default on most Unix-like systems. If not installed, you can get it from the 'sudo' package. 'visudo' will use the text editor found in your $EDITOR variable, whether it's vi, vim, emacs, nano or gedit. After making changes to the /etc/sudoers file, visudo will check for syntax errors, and notify you of them. This is better than 'vi /etc/sudoers', because of this capability. Rule #1 of system administration- if there is a tool that exists for editing config files, use the tool.

Sort files in folders alphabetically

Creates one letter folders in the current directory and moves files with corresponding initial in the folder.

Compare a remote file with a local file

Comment current line

This should work with different locales. Another post reports

move all files older than 60 days to a folder

replace a character/word/string in a file using vim

Replace all ocurrences in the file. The g option is to replace more than one occurrence in the same line. Whitout the g option, it only replace the first occurrence in the line.

Rescan partitions on a SCSI device

Used this after cloning a disk with dd to make the newly written partitions show up in /dev/

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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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