Commands using tail sorted by votes

Commands using tail (292)

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Get the IP address

more variety
This is sample output - yours may be different.
0

ifconfig | grep "inet" | tail -1 | awk '{print $2}'

wotan · 2012-07-13 01:27:59 3
Short Information about loaded kernel modules
This is sample output - yours may be different.
0

lsmod | tail -n +2 | cut -d' ' -f1 | xargs modinfo | egrep '^file|^desc|^dep' | sed -e'/^dep/s/$/\n/g'

vlaad · 2012-09-03 17:59:49 4
Find latest file in a directory
This is sample output - yours may be different.
0

ls -rt | tail -n 1

m0rf · 2012-09-06 07:07:35 5
Function to check whether a regular file ends with a newline

end_w_nl filename will check if the last byte of filename is a unix newline character. tail -c1 yields the file's last byte and xxd converts it to hex format.
This is sample output - yours may be different.
0

end_w_nl() { [[ $(tail -c1 $1 | xxd -ps) == 0a ]] }

xro · 2012-09-18 20:11:29 5
Find the 10 users that take up the most disk space

without reverse...
This is sample output - yours may be different.
0

du -sm /home/* | sort -n | tail -10

bertatum · 2012-10-11 13:58:30 4
delete first X lines of a file

'newfile' will have content of 'file' minus first 55 lines to delete first line only do: tail +2 file > newfile
This is sample output - yours may be different.
0

tail +56 file > newfile

basic612 · 2012-10-26 03:04:12 7
Pipe system log to espeak
This is sample output - yours may be different.
0

tail -f /var/log/messages.log | while read line ; do echo $line | cut -d \ -f5- | sed s/\\[[0-9]*\\]// | espeak ; done

asdfkajsdfh · 2012-10-27 23:00:53 4
Show and update a log file
This is sample output - yours may be different.
0

tail -F logfile

dckt · 2012-11-15 10:12:20 4
count & sort one field of the log files

count & sort one field of the log files , such as nginx/apache access log files .
This is sample output - yours may be different.
0

tail -1000 `ls -ltr /var/log/CF* |tail -1|awk '{print $9}'`|cut -d "," -f 17|sort|uniq -c |sort -k2

raindylong · 2012-11-30 16:30:41 5
show 20 last modified files in current directory including subdirectories
This is sample output - yours may be different.
0

find . -type f -printf "%T@ %Tc %p\n" |sort -n |cut -d' ' -f2- |tail -n20

guziec · 2012-12-04 14:23:55 4
csv file of ping every minutes

Used in OS X. tr "\n" ";" may be replaced by echo ";" with linux versions of date. I reused ping -q -c 1 www.google.com|tail -1|cut -d/ -f5 Show Sample Output
This is sample output - yours may be different.
```
Mer  6 f?v 2013 22:58:23 CET;37.756
Mer  6 f?v 2013 22:58:24 CET;36.194
Mer  6 f?v 2013 22:58:25 CET;28.422
Mer  6 f?v 2013 22:58:26 CET;38.456
Mer  6 f?v 2013 22:58:27 CET;29.385
Mer  6 f?v 2013 22:58:28 CET;38.182
Mer  6 f?v 2013 22:58:29 CET;27.605
```
0

while true; do (date | tr "\n" ";") && ping -q -c 1 www.google.com|tail -1|cut -d/ -f5 ;sleep 1; done >> uptime.csv

fanchok · 2013-02-06 22:06:09 6
Order all files oldest to newest then get the last one touched

On the Mac, the 'ls' function can sort based on month/day/time, but seems to lack ability to filter on the Year field (#9 among the long listed fields). The sorted list continuously increases the 'START' year for the most recently accessed set of files. The final month printed will be the highest month that appeared in that START year. The command does its magic on the current directory, and suitably discards all entries that are themselves directories. If you expect files dating prior to 2002, change the START year accordingly.
This is sample output - yours may be different.
0

ls -lT -rt | grep "^-" | awk 'BEGIN {START=2002} (START <= $9){ print $10 ;START=$9 }' | tail -1

Glamdring · 2013-02-24 23:39:22 7
Easily find an old command you run

this also can find the old command you used before
This is sample output - yours may be different.
0

history | tail -100 | grep cmd

datamining · 2013-04-22 03:49:43 9
Send murmurd log lines to syslog

Sends log lines from murmur's (the mumble server's) logfile to syslog.
This is sample output - yours may be different.
0

nohup tail /var/log/murmur.log | perl -ne '/^<.>[0-9:. -]{24}(\d+ => )?(.*)/; $pid=`pgrep -u murmur murmurd | head`; chomp $pid; `logger -p info -t "murmurd[$pid]" \\"$2\\"`;' &

MagisterQuis · 2013-05-25 01:12:52 6
Print the total lines number of a file

This command print the last line of a file with in first position the total lines number. Show Sample Output
This is sample output - yours may be different.
```
LINE_NUMBERS FILE_CONTENT
```
0

nl FILE_NAME | tail -n 1

P3ter · 2013-07-04 21:54:59 12
compute the qps according to the latest n lines of logs
This is sample output - yours may be different.
0

tail -n 1000 access.log | grep "200 POST" | awk '{print substr($3,0,9)}' | awk '{data[$0]++}END{for(item in data){print item, data[item]}}'

hefei1986 · 2013-08-19 08:15:33 11
Get the Nth argument of the last command in $HISTFILE

This gets the Nth argument in the last line of your history file. This is useful where history is being written after each command, and you want to use arguments from the previous command in the current command, such as when doing copies/moving directories etc. I wrote this after getting irritated with having to continually type in long paths/arguments. You could also use $_ if all you want is the last argument. Show Sample Output
This is sample output - yours may be different.
```
$ echo "This little piggy went to the market"
This little piggy went to the market
$ garg 5
went
```
0

function garg () { tail -n 1 ${HISTFILE} | awk "{ print \$$1 }" }

plasticphyte · 2013-09-10 04:07:46 10
Remove all older kernels then the current running kernel for Ubuntu/Debian base system
This is sample output - yours may be different.
0

export KEEP_KERNEL=2; dpkg -l 'linux-image*' | awk '/^ii/ { print $2 }' | grep "[0-9]" | awk 'BEGIN{i=1}{print i++, $0}' | grep `uname -r` -B99 | sort -r | tail -n+$(($KEEP_KERNEL+2)) | awk '{print $2}'| xargs apt-get -y purge

The_IceMan_Blog · 2013-11-23 15:35:42 7
Find files and calculate size of result in shell
This is sample output - yours may be different.
0

find . -name "pattern" -type f -exec du -ch {} + | tail -n1

stecman · 2014-01-17 03:26:26 7
adb connect to last IP address

Connects to the last adb connection in history. Show Sample Output
This is sample output - yours may be different.
```
success:
adb connect 10.10.20.6

fail:
unable to connect to 10.10.20.6:5555
```
0

eval $(history | cut -c 8- | grep "adb connect [0-9]" | tail -1)

CanOrhan · 2014-02-27 14:44:27 7
AIX: get LUN ID for a given filesystem

For a given filesystem return the LUN ID. Command assumes 1:1 relationship between fs:lv:hdisk:lun which may not be the case in all environments. Show Sample Output
This is sample output - yours may be different.
```
$ getlunid /usr
371100c801ef00004c0000000102745c6e41.105VDASD03AIXvscsi
```
0

getlunid() { lv=$(df -P $1|grep "^/dev/"|awk '{print $1}'|awk -F/ '{print $3}'); hd=$(lslv -l $lv|tail -1|awk '{print $1}');id=$(odmget -q "name like $hd AND attribute=unique_id" CuAt|grep "value ="|awk -F= '{print $2}'|tr -d '"');echo $id;}

bigstupid · 2014-04-20 18:43:21 6
Get the total length of all videos in the current dir in H:m:s

Use case insensitive regex to match files ending in popular video format extensions and calculate their total time. (traverses all files recursively starting from the current directory) Show Sample Output
This is sample output - yours may be different.
```
203:11:32
```
0

find -type f -iregex '.*\.$mkv\|mp4\|wmv\|flv\|webm\|mov\|dat\|flv$' -print0 | xargs -0 mplayer -vo dummy -ao dummy -identify 2>/dev/null | perl -nle '/ID_LENGTH=([0-9\.]+)/ && ($t +=$1) && printf "%02d:%02d:%02d\n",$t/3600,$t/60%60,$t%60' | tail -n 1

powerinside · 2014-06-07 15:50:41 6
Print machine's ipv4 addresses
This is sample output - yours may be different.
0

echo $(ifconfig) | egrep -o "en.*?inet [^ ]* " | sed 's/.*inet $.*$$/\1/' | tail -n +2

davethomas11 · 2014-06-19 22:09:03 7
show filenames in tail output with color

This shows the the filenames of tail output in color. Helpful if you have many log files to tail
This is sample output - yours may be different.
0

tail -f *.log | grep --color=always '|==>.+<=='

danimath · 2014-07-11 07:47:27 7
Backup to LTO Tape with progress, checksums and buffering

This will write to TAPE (LTO3-4 in my case) a backup of files/folders. Could be changed to write to DVD/Blueray. Go to the directory where you want to write the output files : cd /bklogs Enter a name in bkname="Backup1", enter folders/files in tobk="/home /var/www". It will create a tar and write it to the tape drive on /dev/nst0. In the process, it will 1) generate a sha512 sum of the tar to $bkname.sha512; so you can validate that your data is intact 2) generate a filelist of the content of the tar with filesize to $bkname.lst 3) buffer the tar file to prevent shoe-shining the tape (I use 4GB for lto3(80mb/sec), 8gb for lto4 (120mb/sec), 3Tb usb3 disks support those speed, else I use 3x2tb raidz. 4) show buffer in/out speed and used space in the buffer 5) show progress bar with time approximation using pv ADD : To eject the tape : ; sleep 75; mt-st -f /dev/nst0 rewoffl TODO: 1) When using old tapes, if the buffer is full and the drive slows down, it means the tape is old and would need to be replaced instead of wiping it and recycling it for an other backup. Logging where and when it slows down could provide good information on the wear of the tape. I don't know how to get that information from the mbuffer output and to trigger a "This tape slowed down X times at Y1gb, Y2gb, Y3gb down to Zmb/s for a total of 30sec. It would be wise to replace this tape next time you want to write to it." 2) Fix filesize approximation 3) Save all the output to $bkname.log with progress update being new lines. (any one have an idea?) 4) Support spanning on multiple tape. 5) Replace tar format with something else (dar?); looking at xar right now (https://code.google.com/p/xar/), xml metadata could contain per file checksum, compression algorithm (bzip2, xv, gzip), gnupg encryption, thumbnail, videopreview, image EXIF... But that's an other project. TIP: 1) You can specify the width of the progressbar of pv. If its longer than the terminal, line refresh will be written to new lines. That way you can see if there was speed slowdown during writing. 2) Remove the v in tar argument cvf to prevent listing all files added to the archive. 3) You can get tarsum (http://www.guyrutenberg.com/2009/04/29/tarsum-02-a-read-only-version-of-tarsum/) and add >(tarsum --checksum sha256 > $bkname_list.sha256) after the tee to generate checksums of individual files !
This is sample output - yours may be different.
0

bkname="test"; tobk="*" ; totalsize=$(du -csb $tobk | tail -1 | cut -f1) ; tar cvf - $tobk | tee >(sha512sum > $bkname.sha512) >(tar -tv > $bkname.lst) | mbuffer -m 4G -P 100% | pv -s $totalsize -w 100 | dd of=/dev/nst0 bs=256k

johnr · 2014-07-22 15:47:50 8
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List the Sizes of Folders and Directories

I wanted an easy way to list out the sizes of directories and all of the contents of those directories recursively.

To get you started!

Do it.

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"

Clear filesystem memory cache

Found here: http://ubuntuforums.org/showthread.php?t=589975

Add directory to $PATH if it's not already there

Sometimes in a script you want to make sure that a directory is in the path, and add it in if it's not already there. In this example, $dir contains the new directory you want to add to the path if it's not already present. There are multiple ways to do this, but this one is a nice clean shell-internal approach. I based it on http://stackoverflow.com/a/1397020. You can also do it using tr to separate the path into lines and grep -x to look for exact matches, like this: $ if ! $(echo "$PATH" | tr ":" "\n" | grep -qx "$dir") ; then PATH=$PATH:$dir ; fi which I got from http://stackoverflow.com/a/5048977. Or replace the "echo | tr" part with a shell parameter expansion, like $ if ! $(echo "${PATH//:/$'\n'}" | grep -qx "$dir") ; then PATH=$PATH:$dir ; fi which I got from http://www.commandlinefu.com/commands/view/3209/. There are also other more regex-y ways to do it, but I find the ones listed here easiest to follow. Note some of this is specific to the bash shell.

Lists the size of certain file in every 10 seconds

watch is a command especially designed for doing this job

back ssh from firewalled hosts

host B (you) redirects a modem port (62220) to his local ssh. host A is a remote machine (the ones that issues the ssh cmd). once connected port 5497 is in listening mode on host B. host B just do a ssh 127.0.0.1 -p 5497 -l user and reaches the remote host'ssh. This can be used also for vnc and so on.

print contents of file from first match of regex to end of file

Search in "filename" for the first line to match regex, and print to stdout from the matching line to the end of the file.

Get the Nth argument of the last command (handling spaces correctly)

Bash's history expansion character, "!", has many features, including "!:" for choosing a specific argument (or range of arguments) from the history. The gist is any number after !: is the number of the argument you want, with !:1 being the first argument and !:0 being the command. See the sample output for a few examples. For full details search for "^HISTORY EXPANSION" in the bash(1) man page. Note that this version improves on the previous function in that it handles arguments that include whitespace correctly.

Convert df command to posix; uber GREPable

It is a pain grep-ing/sed-ing/awk-ing plain old df. POSIX it!

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Commands using tail (292)

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