Commands using tail sorted by votes

Commands using tail (292)

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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

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rclone - include Service account blobs to your config

For easy portability you can include you service account blobs directly to your rclone config. So it generate a rclone config like the following: [dst977] type = drive scope = drive service_account_credentials = {"type":"service_account","project_id":"saf-ju66hcgi8qf8zidhvfww4oxwe7","private[.................] }

[vim] Clear trailing whitespace in file

% acts on every line in the file. \s matches spaces. \+ matches one or more occurrences of what's right behind it. Character '$' matches end-of-line.

Get Shellcode from ARM Binaries

Getting shellcode from ARM binaries - @OsandaMalith

use screen as a terminal emulator to connect to serial consoles

Use GNU/screen as a terminal emulator for anything serial console related. screen /dev/tty eg. screen /dev/ttyS0 9600 MacOSX: http://www.macosxhints.com/article.php?story=20061109133825654 Cheat Sheet: http://www.catonmat.net/blog/screen-terminal-emulator-cheat-sheet/

display a smiling smiley if the command succeeded and a sad smiley if the command failed

you could save the code between if and fi to a shell script named smiley.sh with the first argument as and then do a smiley.sh to see if the command succeeded. a bit needless but who cares ;)

List the binaries installed by a Debian package

GNU grep's perl-compatible regular expression(PCRE).

Create Encrypted WordPress MySQL Backup without any DB details, just the wp-config.php

The coolest way I've found to backup a wordpress mysql database using encryption, and using local variables created directly from the wp-config.php file so that you don't have to type them- which would allow someone sniffing your terminal or viewing your shell history to see your info. I use a variation of this for my servers that have hundreds of wordpress installs and databases by using a find command for the wp-config.php file and passing that through xargs to my function.

Link a deep tree of files all into on directory

If you want to pull all of the files from a tree that has mixed files and directories containing files, this will link them all into a single directory. Beware of filesystem files-per-directory limits.

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 grep thorugh directory for string in file.

-R, -r, --recursive Read all files under each directory, recursively; this is equivalent to the -d recurse option.

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Commands using tail (292)

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