Commands tagged date

Commands tagged date (105)

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Backup a file with a date-time stamp

"infix" version in bash (4.x+) Remove -v to make it silent. BTW: The OP forgot to use "cat" and "nmap" ;-) I had a good laugh though. Show Sample Output
This is sample output - yours may be different.
```
$ buf a.txt
`a.txt' -> `a-20101215_104638.txt'
$ buf a.txt.gz
`a.txt.gz' -> `a-20101215_104647.txt.gz'
```
0

buf() { f=${1%%.*};e=${1/$f/};cp -v $1 $f-$(date +"%Y%m%d_%H%M%S")$e;}

unefunge · 2010-12-15 09:50:04 0
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 1
Backup a file with a date-time stamp

1. you don't need to prepend the year with 20 - just use Y instead of y 2. you may want to make your function a bit more secure: buf () { cp ${1?filename not specified}{,$(date +%Y%m%d_%H%M%S)}; }
This is sample output - yours may be different.
2

buf () { cp $1{,$(date +%Y%m%d_%H%M%S)}; }

unefunge · 2010-12-14 14:02:03 0
Binary clock

Like 7171, but fixed typo, uses fewer variables, and even more cryptic! Show Sample Output
This is sample output - yours may be different.
```
...*
..*.
..**
.*..
```
4

read -a A<<<".*.**..*....*** 8 9 5 10 6 0 2 11 7 4";for C in `date +"%H%M"|fold -w1`;do echo "${A:${A[C+1]}:4}";done

__ · 2010-12-02 22:04:49 1
Binary clock

cryptic version Show Sample Output
This is sample output - yours may be different.
```
...#
..#.
..#.
..##
```
2

read -a A <<<"8 9 5 10 6 0 3 11 7 4";B='.*.**..*....***';for C in $(date +"%H%M"|fold -w1);do echo "${B:${A[C]}:4}";done

unefunge · 2010-11-26 11:29:23 2
Binary clock

Lightweight alternative with case Show Sample Output
This is sample output - yours may be different.
```
...*
...*
.*.*
.**.
```
0

for a in $(date +"%H%M"|cut -b1,2,3,4 --output-delimiter=" ");do case "$a" in 0)echo "....";;1)echo "...*";;2)echo "..*.";;3)echo "..**";;4)echo ".*..";;5)echo ".*.*";;6)echo ".**.";;7)echo ".***";;8)echo "*...";;9)echo "*..*";;esac;done

unefunge · 2010-11-26 10:58:22 0
Monitor a file with tail with timestamps added
This is sample output - yours may be different.
3

tail -f file |xargs -IX printf "$(date -u)\t%s\n" X

unefunge · 2010-11-25 11:23:13 1
Binary clock

displays current time in "binary clock" format (loosely) inspired by: http://www.thinkgeek.com/homeoffice/lights/59e0/ "Decoding": 8421 .... - 1st hour digit: 0 *..* - 2nd hour digit: 9 (8+1) .*.. - 1st minutes digit: 4 *..* - 2nd minutes digit: 9 (8+1) Prompt-command version: PROMPT_COMMAND='echo "10 i 2 o $(date +"%H%M"|cut -b 1,2,3,4 --output-delimiter=" ") f"|dc|tac|xargs printf "%04d\n"|tr "01" ".*"' Show Sample Output
This is sample output - yours may be different.
```
....
....
.*..
...*
```
3

echo "10 i 2 o $(date +"%H%M"|cut -b 1,2,3,4 --output-delimiter=' ') f"|dc|tac|xargs printf "%04d\n"|tr "01" ".*"

unefunge · 2010-11-24 23:49:21 2
Monitor a file with tail with timestamps added

Should be a bit more portable since echo -e/n and date's -Ins are not. Show Sample Output
This is sample output - yours may be different.
```
....
2010-11-24 05:46:58+0000        ##########
2010-11-24 05:46:59+0000        #  EOF   #
2010-11-24 05:46:59+0000        ##########
```
4

tail -f file | while read line; do printf "$(date -u '+%F %T%z')\t$line\n"; done

derekschrock · 2010-11-24 05:50:12 0
Monitor a file with tail with timestamps added

This is useful when watching a log file that does not contain timestamps itself. If the file already has content when starting the command, the first lines will have the "wrong" timestamp when the command was started and not when the lines were originally written.
This is sample output - yours may be different.
6

tail -f file | while read line; do echo -n $(date -u -Ins); echo -e "\t$line"; done

hfs · 2010-11-19 10:01:57 4
increase recurively the modification time for a list of files

Increase the modification date for the files selected with the find command.
This is sample output - yours may be different.
1

find . -type f | while read line; do NEW_TS=`date -d@$((\`stat -c '%Y' $line\` + <seconds> )) '+%Y%m%d%H%M.%S'`; touch -t $NEW_TS ${line}; done

angleto · 2010-11-18 14:03:32 0
Greets the user appropriately

Saves all the "cut" hacks
This is sample output - yours may be different.
0

echo Good $(i=`date +%H` ; if [ $i -lt 12 ] ; then echo morning ; else if [ $i -lt 15 ] ; then echo afternoon ; else echo evening ; fi ; fi)

jyro · 2010-09-23 09:50:13 0
Work out numerical last month

Work out last months numerical value. Show Sample Output
This is sample output - yours may be different.
```
flojo@gamo:~$ date -d "last month" +%m
08
```
2

LASTMONTHNUM=`date -d "last month" +%m`

flojo · 2010-09-23 08:22:00 0
Last month

Work out last months value Show Sample Output
This is sample output - yours may be different.
```
flojo@gamo:~$ date -d "last month" +%B
August
```
1

LASTMONTH=`date -d "last month" +%B`

flojo · 2010-09-23 08:20:02 0
Check if the Debian package was used since its installation/upgrade.

This script compares the modification date of /var/lib/dpkg/info/${package}.list and all the files mentioned there. It could be wrong on noatime partitions. Here is non-oneliner: #!/bin/sh package=$1; list=/var/lib/dpkg/info/${package}.list; inst=$(stat "$list" -c %X); cat $list | ( while read file; do if [ -f "$file" ]; then acc=$(stat "$file" -c %X); if [ $inst -lt $acc ]; then echo used $file exit 0 fi; fi; done exit 1 ) Show Sample Output
This is sample output - yours may be different.
```
vadim@gaendalf:~$ wasused mc
used /usr/bin/mcedit
vadim@gaendalf:~$ wasused netbeans-platform
vadim@gaendalf:~$ echo $?
1
vadim@gaendalf:~$
```
1

package=$1; list=/var/lib/dpkg/info/${package}.list; inst=$(stat "$list" -c %X); cat $list | (while read file; do if [ -f "$file" ];then acc=$(stat "$file" -c %X); if [ $inst -lt $acc ]; then echo used $file; exit 0; fi; fi; done; exit 1)

pipeliner · 2010-09-20 18:10:19 0
Format date/time string for a different day

The "date' command has options to easily format the date, day, month, time, etc. But what if you want a relative date or time. Like, I wanted yesterday's date in a particular format. You may want the exact date of "2 months ago" or "-3 days" nicely formatted. For that, you can use this command. The --date option takes fuzzy parameters like the ones mentioned in the previous sentence. Show Sample Output
This is sample output - yours may be different.
```
me@my-laptop:~$ date
Wed Sep  8 17:55:57 IST 2010
me@my-laptop:~$ date --date=yesterday +%Y%m%d
20100907
```
2

date --date=yesterday +%Y%m%d

vinayv · 2010-09-08 12:29:31 0
solaris: get seconds since epoch
This is sample output - yours may be different.
0

truss date 2>&1 | awk '/^time/{print $3}'

winky · 2010-07-29 07:26:11 1
find out how many days since given date

Exactly the same number of characters, exactly the same results, but with bc Show Sample Output
This is sample output - yours may be different.
```
$ echo "($(date +%s)-$(date +%s -d "march 1"))/86400"|bc
143
```
2

echo "($(date +%s)-$(date +%s -d "march 1"))/86400"|bc

nickwe · 2010-07-22 19:44:50 0
Print a date from 3 days ago

This command prints the Date (Not time) from 3 days ago (72 hours ago). This works on systems without GNU date (MacOSX , Solaris, FreeBSD). Show Sample Output
This is sample output - yours may be different.
```
$ TZ=PST8PDT+72 date '+%Y_%m_%d'
2010_06_29
```
4

TZ=PST8PDT+72 date '+%Y_%m_%d'

StefanLasiewski · 2010-07-02 00:29:27 6
Move all files between to date

In a folder with many files and folders, you want to move all files where the date is >= the file olderFilesNameToMove and
This is sample output - yours may be different.
2

sudo find . -maxdepth 1 -cnewer olderFilesNameToMove -and ! -cnewer newerFileNameToMove -exec mv -v {} /newDirectory/ \;

javamaniac · 2010-06-30 20:40:30 0
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 0
creeate file named after actual date

Create a file with actual date as filename Show Sample Output
This is sample output - yours may be different.
```
filename-20100524.
--
Alternatives
touch file-`date +%Y%m%d`
touch file-$(date --iso)
```
3

touch file-$(date +%Y%m%d)

rubenmoran · 2010-05-24 07:43:45 2
Grep syslog today last hour

Uses date to grep de logfile for today and uses it to get the last hour logs. Can be used to get last minute logs or today's logs. Show Sample Output
This is sample output - yours may be different.
```
May 23 18:10:01 tortatil /USR/SBIN/CRON[7620]: (root) CMD (if [ -x /usr/bin/mrtg ] 
May 23 18:10:02 laptop sSMTP[7624]: Unable to locate mail
May 23 18:10:02 laptop sSMTP[7624]: Cannot open mail:25
May 23 18:10:02 laptop /USR/SBIN/CRON[7616]: (root) MAIL (mailed 1 byte of output; but got status 0x000
```
6

grep -i "$(date +%b\ %d\ %H)" syslog

rubenmoran · 2010-05-23 16:18:15 4
Easily decode unix-time (funtion)
This is sample output - yours may be different.
1

utime(){ python -c "import time; print(time.strftime('%a %b %d %H:%M:%S %Y', time.localtime($1)))"; }

4Aiur · 2010-05-14 08:00:44 0
Easily decode unix-time (funtion)
This is sample output - yours may be different.
0

utime(){ awk -v d=$1 'BEGIN{print strftime("%a %b %d %H:%M:%S %Y", d)}'; }

4Aiur · 2010-05-14 08:00:04 0
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