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Commands using tail from sorted by
Terminal - Commands using tail - 243 results
tail +56 file > newfile
2012-10-26 03:04:12
User: basic612
Functions: file tail
0

'newfile' will have content of 'file' minus first 55 lines

to delete first line only do:

tail +2 file > newfile

du -sm /home/* | sort -n | tail -10
end_w_nl() { [[ $(tail -c1 $1 | xxd -ps) == 0a ]] }
2012-09-18 20:11:29
User: xro
Functions: tail
Tags: tail xxd zsh
0
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.

tail -n +2 foo.txt
ls -rt | tail -n 1
lsmod | tail -n +2 | cut -d' ' -f1 | xargs modinfo | egrep '^file|^desc|^dep' | sed -e'/^dep/s/$/\n/g'
ifconfig | grep "inet" | tail -1 | awk '{print $2}'
systemctl --failed | head -n -6 | tail -n -1
find . -name "fullcalib4.csv" -exec tail -n1 \{\} \; >>all.csv
amixer -c 0 set Master toggle | tail -1 | awk '{print $4}' | sed "s/[^0-9]//g" ; amixer -c 0 set Speaker toggle >/dev/null; amixer -c 0 set Front toggle >/dev/null
tail -f logfile | logtop
2012-06-24 19:18:30
User: Sizeof
Functions: tail
Tags: tail
-1

logtop show number of lines per second, also classify them so you can show a "top" of every aspect of your logfile :

tail -f access.log | awk '{print $1; fflush();}' | logtop

curl -s kernel.org | grep '<strong>' | head -3 | tail -1 | cut -d'>' -f3 | cut -d'<' -f1
cp $(find /media/ -type f -name "*.wav" -printf "%T@ %h/%f\n" | sort | tail -1 | awk '{ print $2 }') .
2012-06-01 12:45:43
User: hamoid
Functions: awk cp find sort tail
0

Watch out if you have several USB drives plugged in: it scans the whole /media/ folder !!! You can replace /media/ by the path of a specific USB drive (something like /media/F77A-530B/)

I use a sound recorder and I want to plug the recorder and grab the most recent sound.

That's what this command does.

Use mv instead of cp to move instead of copy.

Change *.wav to the required file type.

ls -l| sort +4n|tail -1| awk '{print $NF}'
tail -F /var/log/apache2/access.log | pv -N RAW -lc 1>/dev/null
2012-05-18 17:19:33
User: rex
Functions: tail
0

Great easy way to look at line rates for your server

Good to 30k-60k Lines Per second.

tail -F /var/log/nginx/access.log | python -c 'exec("import sys,time\nl=0\ne=int(time.time())\nfor line in sys.stdin:\n\tt = int(time.time())\n\tl += 1\n\tif t > e:\n\t\te = t\n\t\tprint l\n\t\tl = 0")'
2012-05-15 21:56:46
User: pykler
Functions: python tail
0

Realtime lines per second in a log file using python ... identical to perl version, except python is much better :)

cal 04 2012 | awk 'NF <= 7 { print $7 }' | grep -v "^$" | tail -1
2012-05-03 16:57:45
User: javidjamae
Functions: awk cal grep tail
-2

This is a little trickier than finding the last Sunday, because you know the last Sunday is in the first position of the last line. The trick is to use the NF less than or equal to 7 so it picks up all the lines then grep out any empty lines.

mplayer <(tail -fc +0 <filename>)
2012-04-30 07:28:42
User: gtmanfred
Functions: tail
0

It will just start playing and will not stop at the point that it has downloaded up to when the video starts

tail() { thbin="/usr/bin/tail"; if [ "${1:0:1}" != "-" ]; then fc=$(($#==0?1:$#)); lpf="$((($LINES - 3 - 2 * $fc) / $fc))"; lpf="$(($lpf<1?2:$lpf))"; [ $fc -eq 1 ] && $thbin -n $lpf "$@" | /usr/bin/fold -w $COLUMNS | $thbin -n $lpf || $thbin -n $lpf...
2012-03-23 19:00:30
User: fpunktk
Functions: tail
-1
tail() { thbin="/usr/bin/tail"; if [ "${1:0:1}" != "-" ]; then fc=$(($#==0?1:$#)); lpf="$((($LINES - 3 - 2 * $fc) / $fc))"; lpf="$(($lpf<1?2:$lpf))"; [ $fc -eq 1 ] && $thbin -n $lpf "$@" | /usr/bin/fold -w $COLUMNS | $thbin -n $lpf || $thbin -n $lpf "$@"; else $thbin "$@"; fi; unset lpf fc thbin; }

This is a function that implements an improved version of tail. It tries to limit the number of lines so that the screen is filled completely. It works with pipes, single and multiple files. If you add different options to tail, they will overwrite the settings from the function.

It doesn't work very well when too many files (with wrapped lines) are specified.

Its optimised for my three-line prompt.

It also works for head. Just s/tail/head/g

Don't set 'thbin="tail"', this might lead to a forkbomb.

while [ 1 ]; do tail /var/log/httpd/error_log; sleep 2; clear; done
git-random(){ gitRan=$(curl -L -s http://whatthecommit.com/ |grep -A 1 "\"c" |tail -1 |sed 's/<p>//'); git commit -m "$gitRan"; }
2012-03-07 22:25:14
Functions: grep sed tail
-1

Put in your path (.bashrc or similar).

Then instead of running '$ git-commit -m ' use '$ git-random'

tail -f file | ts '%H:%M:%.S'
2012-03-02 11:15:29
User: Vagrant
Functions: file tail
2

Uses the command ts in order to add a timestamp on each line. This command is provided in the moreutils package on Debian, and you may need libtime-duration-perl to be able to format the date.

tail -f production.log | perl -ne 'if (/^Completed.in.(\d+)/){$d = int($1/1000);print "\n";$f{$d}++;for $t (sort(keys(%f))){print $t."s: ".$f{$t}."\n"}}'
2012-02-23 14:37:33
User: theist
Functions: perl tail
0

Commandline perl filter for, using a production.log from a rails app, display on realtime the count of requests grouped by "seconds to complete" (gross round, but fair enough for an oneliner) :)

identify image.jpg |grep -o "[[:digit:]]*x[[:digit:]]*" |tail -1
tail -f file | while read; do echo "$(date +%T.%N) $REPLY"; done