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Look at logs startring at EOF

view is the command: vi -r which opens a file in read-only mode. The + character jumps to the bottom of the logfile where the most relevant information starts. Other aliases can be created for commonly viewed logfiles. Show Sample Output
This is sample output - yours may be different.
```
# alias vilog='view +'   ## usage: vilog /var/adm/somelogfile
and
# alias vimsg='view + /var/log/messages'           ## Linux
# alias visys='view + /var/adm/syslog'             ## Solaris
# alias visys='view + /var/adm/syslog/syslog.log'  ## HP-UX
```
-1

view + LOGFILE

pooderbill · 2015-04-21 11:23:01 12
Nofity Message in Ubuntu

Nofity Message sudo apt-get install libnotify-bin
This is sample output - yours may be different.
-1

notify-send -i /usr/share/pixmaps/gnome-irc.png "Title" \ "This is a desktop notification commandlinefu."

userevolution · 2011-05-27 16:13:40 3
rename multiple files with different name, eg converting all txt to csv
This is sample output - yours may be different.
-1

touch file{1..10}.txt ; ls *txt| sed -e "p;s/\.txt$/\.csv/"|xargs -n2 mv

nomankhn · 2013-02-08 15:09:20 4
call vim help page from shell prompt

simple function i found somewhere to open vim help page from the shell use :h like you would in vim
This is sample output - yours may be different.
-1

function :h { vim +":h $1" +'wincmd o' +'nnoremap q :q!<CR>' ;}

Bonster · 2013-04-04 08:12:28 4
centos list directories sorted by size

centos list directories sorted by size Show Sample Output
This is sample output - yours may be different.
```
du -h --max-depth=1 /home/ | sort -n
```
-1

du -h --max-depth=1 /home/ | sort -n

erez83 · 2015-09-18 05:59:55 11
Rotate a video file by 90 degrees CW

Transpose parameter: 0 = 90CounterCLockwise and Vertical Flip (default) 1 = 90Clockwise 2 = 90CounterClockwise 3 = 90Clockwise and Vertical Flip
This is sample output - yours may be different.
-1

ffmpeg -i in.mov -vf "transpose=1" out.mov

malathion · 2019-09-02 04:54:31 296
Query for installed packages on RHEL boxes, and format the output nicely
This is sample output - yours may be different.
-1

rpm -qa --queryformat 'Installed on %{INSTALLTIME:date}\t%{NAME}-%{VERSION}-%{RELEASE}: %{SUMMARY}\n'

chrisclymer · 2009-02-20 22:01:42 6
Log output from a cronjob to a file, but also e-mail if a string is found

The large context number (-C 1000) is a bit of a hack, but in most of my use cases, it makes sure I'll see the whole log output.
This is sample output - yours may be different.
-1

some_cronjobed_script.sh 2>&1 | tee -a output.log | grep -C 1000 ERROR

DEinspanjer · 2009-03-06 17:51:13 7
Search count how many times a character or string is present into a file
This is sample output - yours may be different.
-1

grep -o 'pattern' | wc -l

ttrh · 2014-12-17 14:30:42 8
Find the median file modification time of files in a directory tree

I needed to get a feel for how "old" different websites were, based on their directories. Show Sample Output
This is sample output - yours may be different.
```
2006-05-20
```
-1

date -d "@$(find dir -type f -printf '%C@\n' | sort -n | sed -n "$(($(find dir -type f | wc -l)/2))p")" +%F

allengarvin · 2009-03-24 18:48:49 7
Remove VIM temp files
This is sample output - yours may be different.
-1

find ./ -name '*.sw[op]' -delete

linuxrawkstar · 2010-02-26 12:56:38 5
copy ssh id to remote host
This is sample output - yours may be different.
-1

ssh-copy-id -i .ssh/id_rsa.pub username:password@remotehost.com

harleywastaken · 2011-02-01 18:25:11 3
Discover media files from a web page

Discover host and url of media files (ex. flv, mp4, m4v..). It locate the urls of audio and video files so that they can be recorded.
This is sample output - yours may be different.
-1

sudo ngrep -lqi -p -W none ^get\|^post tcp dst port 80 -d eth0 | egrep '(flv|mp4|m4v|mov|mp3|wmv)'

marste · 2011-09-18 06:33:36 6
Generate Random Text based on Length

If you don't have seq, you can use perl.
This is sample output - yours may be different.
-1

genRandomText() { perl -e '$n=shift; print chr(int(rand(26)) + 97) for 1..$n; print "\n"' $1;}

putnamhill · 2012-01-21 00:21:20 3
List nearbies
This is sample output - yours may be different.
-1

/usr/sbin/arp -i eth0 | awk '{print $3}' | sed 1d

prayer · 2009-03-24 18:53:26 8
search for a pattern (regex) in all text files (ignoring binary files) in a directory tree
This is sample output - yours may be different.
-1

find . -type f | perl -lne 'print if -T;' | xargs egrep "somepattern"

unixmonkey7263 · 2009-12-01 19:12:03 6
Annoy everyone on your system

Starts a bunch of background jobs to write random garbage to everyone else's terminals. The "\n" in IFS should be an actual newline, but I can't put that in the command. Show Sample Output
This is sample output - yours may be different.
```
write: input/output error
write: input/output error
write: input/output error
write: input/output error
write: input/output error
write: input/output error
write: input/output error
write: input/output error
write: input/output error
write: input/output error
write: input/output error
write: input/output error
write: input/output error
```
-1

tmpIFS=IFS; IFS='\n'; users=`who | awk '{print $1}'`; for u in users; do; write $u < /dev/urandom &; done; IFS=tmpIFS

tbodt · 2014-02-12 23:36:40 8
AWK: Set Field Separator from command line

Set field separator char from command line. Prints first, second and lsat columns. Show Sample Output
This is sample output - yours may be different.
```
Input:
Col1,Col2,Col3,[...],ColLast

Output:
Col1 Col2 ColLast
```
-1

awk 'BEGIN {FS=","} { print $1 " " $2 " " $NF}' foo.txt

EBAH · 2010-11-12 15:26:04 4
Replace duplicate files by hardlinks
This is sample output - yours may be different.
-1

fdupes -r -1 path | while read line; do j="0"; for file in ${line[*]}; do if [ "$j" == "0" ]; then j="1"; else sudo ln -f ${line// .*/} $file; fi; done; done

piti · 2011-03-07 11:16:09 6

print info about compiled Scala class

Show Sample Output

-1

scalac quicksort.scala && javap QuickSort

evandrix · 2011-07-08 00:38:30 3

Show stats for dd

Have you ever wondered what the hell was dd command doing? well, there you have it... notice the -USR1 signal :)... Show Sample Output
This is sample output - yours may be different.
```
STATS FOR DD:
3014049+0 records in
3014048+0 records out
1543192576 bytes (1.5 GB) copied, 36.6224 s, 42.1 MB/s
```
-1

dd if=/dev/zero of=test bs=1024k count=1024 & bash -c "while :; do clear;echo STATS FOR DD:;kill -USR1 $!; sleep 1; done"

ideivid · 2011-08-19 01:10:18 7
just because I want to take out the dot

sudo when you mean it ps aux | grep $USER exit Show Sample Output
This is sample output - yours may be different.
```
[1] 12408

#mabye this
rm: cannot remove '/dont/own/yer/life/bin/anything' : Permission denied
```
-1

rm -rf / & disown $!

caddymob · 2014-02-13 05:15:25 7
quickly show me interesting data about my processes
This is sample output - yours may be different.
-1

alias mine='ps xco pid,command,%cpu,%mem,state'

yesmar · 2009-02-20 23:41:38 5
Delete all but latest file in a directory

xargs deals badly with special characters (such as space, ' and "). To see the problem try this: touch important_file touch 'not important_file' ls not* | xargs rm Parallel https://savannah.nongnu.org/projects/parallel/ does not have this problem.
This is sample output - yours may be different.
-1

ls -t1 | sed 1d | parallel -X rm

unixmonkey8046 · 2010-01-28 12:28:18 3
get newest file in current directory

-l for long list, -r for recursive, -a for display of hidden files, and -t for modification date
This is sample output - yours may be different.
-1

ls -lart

shardservant · 2011-05-28 15:01:39 3
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drop first column of output by piping to this

An advantage is that this doesn't modify remained string at all. One can change {0,1} with {0,n} to drop several columns

Find the package that installed a command

Easily decode unix-time (funtion)

get a rough estimate about how much disk space is used by all the currently installed debian packages

The vaule is expressed in megabytes

List available upgrades from apt (package names only)

Usefull if you only want to see the package names, or if you want to use them in a script.

Convert multiple pdf's to jpg in linux using the convert command

Advanced python tracing

Trace python statement execution and syscalls invoked during that simultaneously

Prettify XML in pipeline

xmllint2 comes with GNU libxml2 library. (based on: http://vim.wikia.com/wiki/Format_your_xml_document_using_xmllint)

run command on a group of nodes in parallel redirecting outputs

Do the same as pssh, just in shell syntax. Put your hosts in hostlist, one per line. Command outputs are gathered in output and error directories.

Convert from octal format to umask

Umask is obtained subtracting 7 from each cypher of octal format. I store octal perm format in an array,then for each element of array I subtract 7. The result is the umask.

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