Commands using tail sorted by votes

Commands using tail (292)

sorted by

last mounted device
This is sample output - yours may be different.
-3

mount |tail -1 | less -p "/dev/[^ ]*"

totti · 2011-08-28 16:29:42 5
find the 10 largest directories

http://superuser.com/questions/9847/linux-utility-for-finding-the-largest-files-directories
This is sample output - yours may be different.
-3

find . -type d -print0 | xargs -0 du -s | sort -n | tail -10 | cut -f2 | xargs -I{} du -sh {} | sort -rn

noah · 2013-06-26 02:08:21 7
Pick a random line from a file

prints a random line
This is sample output - yours may be different.
-4

head -$(($RANDOM % $(wc -l < file.txt) +1 )) file.txt | tail -1

sharfah · 2009-07-23 12:00:49 3
Get Futurama quotations from slashdot.org servers
This is sample output - yours may be different.
-4

echo -e "HEAD / HTTP/1.1\nHost: slashdot.org\n\n" | nc slashdot.org 80 | head -n5 | tail -1 | cut -f2 -d-

beerbrain · 2009-07-31 06:49:52 3
Get your external IP address
This is sample output - yours may be different.
-4

echo -e "GET /automation/n09230945.asp HTTP/1.0\r\nHost: whatismyip.com\r\n" | nc whatismyip.com 80 | tail -n1

Marko · 2009-11-03 15:18:20 14
Show the single most recently modified file in a directory

Takes a directory name as an argument (defaults to current directory if no arguments are given). Prints the newest file in the directory. Show Sample Output
This is sample output - yours may be different.
```
$ ls -lart /tmp | tail -3
-rw-rw-rw-  1 bchittenden bchittenden    25919 Oct 17 10:37 image.txt
drwx------  2 bchittenden bchittenden     4096 Oct 17 11:30 orbit-bchittenden
drwxrwxrwt 22 root        root           12288 Oct 17 11:30 .

$ lastfile /tmp
/tmp/image.txt
```
-4

lastfile () { find ${1:-.} -maxdepth 1 -type f -printf "%T+ %p\n" | sort -n | tail -n1 | sed 's/[^[:space:]]\+ //'; }

bartonski · 2011-10-17 16:08:02 3
colorize and continuously tail two files

(follow with next command) tail -f from.log | colorize.pl +l20:".*" & Use with http://www.commandlinefu.com/commands/view/10031/intercept-monitor-and-manipulate-a-tcp-connection. - can use to view output of tees that send traffic to files - output will be interwoven with red for sent traffic and green for received. get colorize.pl from http://www.flinkmann.de/71-1-Colorizepl.html
This is sample output - yours may be different.
-4

tail -f to.log | colorize.pl +l10:".*" &

peter4512 · 2012-01-20 21:46:47 6
Poll and print end of lates modified file

Watches for file modifications in the current directory and tails the file.
This is sample output - yours may be different.
-4

watch 'ls -tr1 | tail -n1 | xargs tail'

batandwa · 2013-05-09 11:37:59 10
Print just line 4 from a textfile
This is sample output - yours may be different.
-5

tail -n +4 | head -n 1

unixmonkey10745 · 2010-07-09 12:10:03 27
show space used by postgres

this command shows the space used in postgres directory. Show Sample Output
This is sample output - yours may be different.
```
4	./pg_twophase
5364	./base/17868
5268	./base/11563
5268	./base/1
114288	./base/11564
4	./base/pgsql_tmp
5736	./base/19846
135932	./base
268584	.
268584	total
```
-5

while (( 1==1 )); do du -c . >> output.log; sleep 2; done; tail -f output.log

aceiro · 2010-07-12 17:23:45 4
Go to the Nth line of file

Silly approach, but easy to remember... Show Sample Output
This is sample output - yours may be different.
```
tcpmux		1/tcp				# TCP port service multiplexer
```
-5

head -n 13 /etc/services | tail -n 1

muonIT · 2011-09-15 19:39:49 13
To print a specific line from a file

Tail is much faster than sed, awk because it doesn't check for regular expressions. Show Sample Output
This is sample output - yours may be different.
```
$ tail -n +5 /var/log/dmesg | head -n 1
[    0.000000] KERNEL supported cpus:
```
-5

tail -n +<N> <file> | head -n 1

qweqq · 2011-09-30 08:30:30 6
Check syntax of cron files (by restarting the service and checking the logs)

Debian-specific but very useful as cron files are prone to very subtle gotchas
This is sample output - yours may be different.
-7

/etc/init.d/cron restart && tail -100 /var/log/syslog

root · 2010-05-05 09:56:30 3
Print just line 4 from a textfile

tail -n X | head -n 1 prints a specific line, where X is the line number
This is sample output - yours may be different.
-7

tail -n 4 | head -n 1

puddy · 2010-07-08 19:50:06 3
Easily find an old command you run

I know how hard it is to find an old command running through all the files because you couldn't remember for your life what it was. Heres the solution!! Grep the history for it. depending on how old the command you can head or tail or if you wanted to search all because you cannot think how long ago it was then miss out the middle part of the command. This is a very easy and effective way to find that command you are looking for.
This is sample output - yours may be different.
-9

cat .bash_history | tail -100 | grep {command}

techie · 2013-04-10 10:40:52 8
get you public ip address
This is sample output - yours may be different.
-11

/usr/bin/lynx -dump http://www.netins.net/dialup/tools/my_ip.shtml | grep -A2 "Your current IP Address is:" | tail -n1 | tr -d ' '|sed '/^$/d'| sed 's/^ *//g'

juanmi · 2010-12-20 15:29:53 4
Look at logs startring at EOF

In cases when the user is following a log file that rotates then it is advisable to use the -F option as it keeps following the log even when it is recreated, renamed, or removed as part of log rotation. To interrupt tail while it is monitoring, break-in with Ctrl+C.
This is sample output - yours may be different.
-12

tail -f <file>

adrruiz · 2015-06-01 16:55:00 14
‹ First < 10 11 12

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

Create a mirror of a local folder, on a remote server

Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

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

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

power off system in X minutes

Replace 60 with the number of minutes until you want the machine to shut down. Alternatively give an absolute time in the format hh:mm (shutdown -h 9:30) Or shutdown right away (shutdown -h now)

Multi line grep using sed and specifying open/close tags

Working with log files that contains variable length messages wrapped between open and close tags it may be useful to filter the messages upon a keyword. This works fine with GNU sed version 4.2 or higher, so pay attention to some unix distros (solaris, hp-ux, etc.). Linux should be ok.

using `!#$' to referance backward-word

expand to: cp /work/host/phone/ui/main.cpp /work/target/phone/ui/main.cpp !# The entire command line typed so far.

Adjust all EXIF timestamps in .mov by +1 hour

works for Powershot SD780 IS

Sorted, recursive long file listing

Tells you everything you could ever want to know about all files and subdirectories. Great for package creators. Totally secure too. On my Slackware box, this gets set upon login: $ LS_OPTIONS='-F -b -T 0 --color=auto' and $ alias ls='/bin/ls $LS_OPTIONS' which works great.

Recall last argument of previous command

!$ recalls the last argument of the previous command. This is very useful when you have to operate several operations on the same file for example.

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 tail

Commands using tail (292) 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 tail (292)

sorted by