Commands using date sorted by votes

Commands using date (199)

sorted by

Convert unix timestamp to date
This is sample output - yours may be different.
2

date -d @1234567890

computermacgyver · 2013-05-28 12:17:00 6
Synchronize date and time with a server over ssh

using -u is better for standardizing date output and timezones, for servers in different timezones.
This is sample output - yours may be different.
2

date --set="$(ssh user@server 'date -u')"

unixmonkey49259 · 2013-06-03 06:43:49 5
Display EPOCH time in human readable format using AWK.
This is sample output - yours may be different.
2

$ date --date='@1268727836'

bharat · 2014-05-09 09:27:56 7
keep a log of the active windows

This logs the titles of the active windows, thus you can monitor what you have done during which times. (it is not hard to also log the executable name, but then it is gets too long) Show Sample Output
This is sample output - yours may be different.
```
2015-09-24 00:58:24: Guake!
2015-09-24 00:59:24: Guake!
2015-09-24 00:60:25: Commands matching running program sorted by votes | commandlinefu.com 
```
2

while true; do (echo -n $(date +"%F %T"):\ ; xwininfo -id $(xprop -root|grep "ACTIVE_WINDOW("|cut -d\ -f 5) | grep "Window id" | cut -d\" -f 2 ) >> logfile; sleep 60; done

BeniBela · 2015-09-23 23:00:14 24
Simple Video Surveillance by email

This takes a picture (with the web cam) every 5 minutes, and send the picture to your e-mail. Some systems support mail -a "References: " so that all video surveillance emails are grouped in a single email thread. To keep your inbox clean, it is still possible to filter and move to trash video surveillance emails (and restore these emails only if you really get robbed!) For instance with Gmail, emails sent to me+trash@gmail.com can be filtered with "Matches: DeliveredTo:me+trash@gmail.com" Show Sample Output
This is sample output - yours may be different.
```
--- Opening /dev/video0...
Trying source module v4l2...
/dev/video0 opened.
No input was specified, using the first.
--- Capturing 15 frames...
Captured 15 frames in 1.86 seconds. (8 fps)
--- Processing captured image...
Writing JPEG image to '-'.
--- Opening /dev/video0...
Trying source module v4l2...
/dev/video0 opened.
No input was specified, using the first.
--- Capturing 15 frames...
Captured 15 frames in 1.86 seconds. (8 fps)
--- Processing captured image...
Writing JPEG image to '-'.
```
2

while true ; do fswebcam -d /dev/video0 -r 1280x1024 -F 15 - | uuencode $(date +\%Y\%m\%d\%H\%M).jpeg | mail -s "Video surveillance" $USER ; sleep 300 ; done

pascalvaucheret · 2016-08-09 14:22:45 14
Bash function that saves bash functions to file from shell session

The simpler, 1-arg version is save_function(){ { date +"# %F.%T $1; declare -f "$1";}| tee -a ~/.bash_functions; }` Show Sample Output
This is sample output - yours may be different.
```
$ save_function save_function
# 2019-07-16.18:03:57 save_function
save_function ()
{
    while [[ $# > 0 ]]; do
        {
            date +"# %F.%T $1";
            declare -f "$1"
        } | tee -a ~/.bash_functions;
        shift;
    done
}
```
2

save_function(){ while [[ $# > 0 ]]; do { date +"# %F.%T $1; declare -f "$1";}| tee -a ~/.bash_functions; shift; done;}

mcint · 2019-07-17 01:06:59 92

Monitor changed files into a log file, with day rotation, using fswatch (MacOS)

This command monitors changes in the current folder structure (subfolders included) and files, and log it into a hidden file in the same folder, called `.file_changes_YYMMDD.log`. Modify the `--exclude` parameters to define what should be skipped. Show Sample Output

fswatch --exclude=.git/* --exclude=.settings --event-flags --event-flag-separator=\; -t -f '%Y-%m-%d %H:%M:%S' . >> ./.file_changes_$(date +"%Y-%m-%d" | sed s/-//g).log

paulera · 2023-08-17 23:06:30 201

Update your journal

prerequisite: mkdir ~/journal
This is sample output - yours may be different.
1

vi ~/journal/$(date +%F)

ar · 2009-03-18 23:31:13 4
Then end of the UNIX epoch

http://en.wikipedia.org/wiki/Year_2038_problem Some other notable dates that have passed: date -d@1234567890 date -d@1000000000 Show Sample Output
This is sample output - yours may be different.
```
Tue Jan 19 08:44:07 IST 2038
```
1

date -d @$(echo $((2 ** 31 - 1)))

jnash · 2009-03-30 19:42:20 4
Find the modified time (mtime) for a file
This is sample output - yours may be different.
1

date -r foo

tatwright · 2009-04-15 09:54:50 9
get a mysqldump with a timestamp in the filename and gzip it all in one go

Performs a mysqldump and gzip-compresses the output file with a timestamp in the resulting dump file. Inspect the file for integrity or fun with this command afterward, if you desire: zcat mysqldump-2009-06-12-07.41.01.tgz | less Show Sample Output
This is sample output - yours may be different.
```
no output, just a new file named something like "mysqldump-2009-06-12-07.41.01.tgz"
```
1

mysqldump [options] |gzip ->mysqldump-$(date +%Y-%m-%d-%H.%M.%S).gz

linuxrawkstar · 2009-06-12 12:42:59 6
Create a backup of the file.

It will create a backup of the filename. The advantage is that if you list the folder the backups will be sorted by date. The command works on any unix in bash. Show Sample Output
This is sample output - yours may be different.
```
$ cp test.txt{,-$(date +%Y-%m-%d)}
$ ls -l test.txt*
-rw-rw-r--  1 user group 0 Aug  6 13:40 test.txt
-rw-rw-r--  1 user group 0 Aug  6 13:41 test.txt-2009-08-06
```
1

cp path/filename{,-$(date +%Y-%m-%d)}

vutcovici · 2009-08-06 13:50:00 5
Find out when your billion-second anniversary is (was).

Replace 12/31/1970 with your birth date.
This is sample output - yours may be different.
1

date -d12/31/1970+1000000000sec

clone · 2009-08-16 10:12:30 14
Find out when your billion-second anniversary is (was). (on OS X)

This is the same command as this one, but for OS X. http://www.commandlinefu.com/commands/view/3053/find-out-when-your-billion-second-anniversary-is-was. Show Sample Output
This is sample output - yours may be different.
```
Mo 25 M?r 2013 23:24:41 CET
```
1

date -j -v +1000000000S -f %m%d%Y mmddyyyy

Zettt · 2009-08-16 20:41:30 5
Find out when your billion-second anniversary is (was).

This is the same command as this one, but for OS X. http://www.commandlinefu.com/commands/view/3053/find-out-when-your-billion-second-anniversary-is-was. Show Sample Output
This is sample output - yours may be different.
```
Mo 25 M?r 2013 23:24:41 CET
```
1

date -j -v +1000000000S -f %m%d%Y mmddYYYY

Zettt · 2009-08-16 20:42:29 11
Creat a tar file for backup info

Use tar command for a backup info with a date of creation Show Sample Output
This is sample output - yours may be different.
```
tar --create --file /path/$HOSTNAME-etc-$(date -I).tar.gz --atime-preserve -p -P --same-owner -z /etc/
```
1

tar --create --file /path/$HOSTNAME-my_name_file-$(date -I).tar.gz --atime-preserve -p -P --same-owner -z /path/

Odin_sv · 2009-09-07 04:52:12 4
Poor man's ntpdate

If you don't have netcat, you can use curl.
This is sample output - yours may be different.
1

date -s "`curl -sI www.example.com | sed -n 's/^Date: //p'`"

putnamhill · 2010-01-08 21:05:41 4
Easily decode unix-time (funtion)
This is sample output - yours may be different.
1

utime(){ date -d "1970-01-01 GMT $1 seconds"; }

4Aiur · 2010-05-14 07:49:49 4
read unixtimestamp with festival

you will hear how many seconds since 1.1.1970 in english words with billions, millions and thousands. this is very useful, if you want to get over to use the unixtimestamp instead of the 24 hour clock in your dayly life Show Sample Output
This is sample output - yours may be different.
```
1275038122
```
1

say='festival --tts'; S=$(date +%s); echo $(echo $S | cut -b 1-1)" billion" | $say ; echo $(echo $S | cut -b 2-4 | sed 's/0*//')" million"| $say; echo $(echo $S | cut -b 5-7 | sed 's/0*//')" thousand"| $say

rubo77 · 2010-05-28 09:19:24 3
create random numbers within range for conjob usage

if you need to install cron jobs in a given time range. Show Sample Output
This is sample output - yours may be different.
```
33 02 * * * backup-rsync-push.sh
```
1

H=$(until ([ $i -le 6 -a $i -gt 0 -o $i -le 23 -a $i -gt 21 ] ); do i=$(date +%N | cut -c8-10); done ; echo $i) ; M=$(until [ $i -le 59 ]; do i=$(date +%N | cut -c8-10); done ; echo $i) ; echo $M $H \* \* \* backup-rsync-push.sh

christian773 · 2010-05-29 08:42:43 6
Backup a file with a date-time stamp

buf myfile.txt This is useful when you are making small but frequent changes to a file. It keeps things organised and clear for another administrator to see what changed and at what time. An overview of changes can be deduced using a simple: ls -ltr
This is sample output - yours may be different.
1

buf () { filename=$1; filetime=$(date +%Y%m%d_%H%M%S); cp ${filename} ${filename}_${filetime}; }

dopeman · 2010-12-14 13:19:52 6
Get the next weekday for an 'at' command

Line can be modified as needed. This considers weekdays to be Mon-Fri. If run any working day it'll provide a parameters for the next working day for "at". "beep" provided as a sample command. This can be modified easily to include wait time. If you need something to run "D" days after today: # D=4;if [ $(date +%u --date="${D} days") -lt 5 ];then AT="+${D} days";else AT="next monday";fi; echo "beep" | at noon ${AT}
This is sample output - yours may be different.
1

if [ $(date +%u) -lt 6 ];then AT="tomorrow"; else AT="next monday";fi;echo "beep" | at ${AT}

eduo · 2011-06-01 14:15:11 8
Sort and count subjects of emails stuck in Exim queue
This is sample output - yours may be different.
1

grep -R Subject /var/spool/exim/input/ | sed s/^.*Subject:\ // | sort | uniq -c | sort -n > ~/email_sort.$(date +%m.%d.%y).txt

unixmonkey27702 · 2011-11-24 14:13:29 3
prettier

Slightly shorter to type
This is sample output - yours may be different.
1

cal | grep -C7 --color=auto $(date +%d)

cjp64 · 2011-11-29 11:35:41 33
Time conversion/format using the date command

Show Sample Output
This is sample output - yours may be different.
```
epoch: 1323946029 or format: 2011/12/15
```
1

date -d '2011-12-15 05:47:09' +"epoch: %s or format: %Y/%m/%d"

axelabs · 2011-12-16 18:43:36 3
‹ First < 2 3 4 5 6 > Last ›

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

Using vim to save and run your python script.

This will save and execute your python script every time your press the F5 function key. It can also be added to your .vimrc: autocmd BufRead *.py nmap :w^M:!python % NOTE: the ^M is not just caret-M, it can be created by type: ctrl-v ctrl-m

calculate the total size of files in specified directory (in Megabytes)

list block devices

Shows all block devices in a tree with descruptions of what they are.

Benchmark SQL Query

Benchmark a SQL query against MySQL Server. The example runs the query 10 times, and you get the average runtime in the output. To ensure that the query does not get cached, use `RESET QUERY CACHE;` on top in the query file.

Run remote web page, but don't save the results

I have a remote php file that I want to run once an hour. I set up cron to run this wget. I don't really care about what's in the file though, I don't want to save the results, so I run the -O and send it to /dev/null

Convert from octal format to umask

Umask is obtained subtracting 7 from each cypher of octal format. I store octal perm format in an array,then for each element of array I subtract 7. The result is the umask.

Enable ** to expand files recursively (>=bash-4.0)

Since bash 4.0, you can use ** to recursively expand to all files in the current directory. This behaviour is disabled by default, this command enables it (you'd best put it in your .profile). See the sample output for clarification. In my opinion this is much better than creating hacks with find and xargs when you want to pass files to an application.

show each new entry in system messages as a popup

It willl popup a message for each new entry in /var/log/messages found on the notify-send howto page on ubuntuforums.org. Posted here only because it is one of the favourites of mine.

Recursively scan directories for mp3s and pass them to mplayer

The command first deletes any old playlist calles playlist.tmp under /tmp. After that it recursively searches all direcotries under ~/mp3 and stores the result in /tmp/playlist.tmp. After havin created the playlist, the command will execute mplayer which will shuffle through the playlist. This command is aliased to m is aliased to `rm -rf /tmp/playlist.tmp && find ~/mp3 -name *.mp3 > /tmp/playlist.tmp && mplayer -playlist /tmp/playlist.tmp -shuffle -loop 0 | grep Playing' in my ~/.bashrc.

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" }

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 using date

Commands using date (199) 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 using date (199)

sorted by