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Upgrade Node.js via NPM
This is sample output - yours may be different.
-1

sudo npm cache clean -f | sudo npm install -g n | sudo n stable

JimFriend · 2015-04-25 16:54:07 17
See how much time you've spent logged in

Add -n to last command to restrict to last num logins, otherwise it will pull all available history. Show Sample Output
This is sample output - yours may be different.
```
421h:42m:18s
```
-1

last|grep `whoami`|grep -v logged|cut -c61-71|sed -e 's/[()]//g'|awk '{ sub("\\+", ":");split($1,a,":");if(a[3]){print a[1]*60*60+a[2]*60+a[3]} else {print a[1]*60+a[2] }; }'|paste -s -d+ -|bc|awk '{printf "%dh:%dm:%ds\n",$1/(60*60),$1%(60*60)/60,$1%60}'

donjuanica · 2015-09-19 03:02:43 9
make a .bak backup copy of all files in directory

quick in directory backup of all files in this directory. Adds the .bak extension to all copies.
This is sample output - yours may be different.
-1

for i in * ; do cp $i $i.bak; done

swinz · 2009-02-05 15:15:40 38
Get the revision number at which the current branch is created.
This is sample output - yours may be different.
-1

svn log --stop-on-copy | grep r[0-9] | awk '{print $1}' | sed "s/r//" | sort -n | head -1

jimthunderbird · 2010-10-07 21:21:20 3
Deletes all branches in a git repository except next and master (clean git repo)

This command will delete all branches in your git repository other than next and master. I use this to cleanup my git repos after making multiple branches and merging them back into next. It's much faster than individually deleting each expired branch using: git branch -D <branch_name>
This is sample output - yours may be different.
-1

git branch -D `git branch | awk '{ if ($0 !~ /next|master/) printf "%s", $0 }'`

denheck · 2011-04-14 17:43:21 4
show physical disk using

show physical disk using, except tmpfs, gvfs, and so on.
This is sample output - yours may be different.
-1

df -x tmpfs | grep -vE "(gvfs|procbususb|rootfs)"

bones7456 · 2009-02-09 01:54:05 12

Batch Convert MP3 Bitrate

Batch Convert MP3 Bitrate to xxxkbps, all the new files will be placed in a folder called "save". Please replace xxx with the desired bitrate. WARNING!!! This will erase any tag information; this is where Picard or EasyTAG will come in handy. Show Sample Output

-1

mkdir save && for f in *.mp3; do lame -b xxx "$f" ./save/"${f%.mp3}.mp3"; done

o0110o · 2011-05-30 17:19:36 4

reverse order of file
This is sample output - yours may be different.
-1

tac $FILETOREVERSE

SQUIIDUX · 2011-05-30 17:54:27 3
find forms in a symfony 1.2 project

finds all forms instanciated into a symfony project, pruning svn files.
This is sample output - yours may be different.
-1

find apps/ -name "*.svn-base" -prune -o -print -name "*.php" | xargs grep -E 'new .+Form\('

ubermuda · 2009-02-17 14:56:01 8
Kill processes hogging up CPU (Flash after resume)

I found Flash eating one of my CPUs after resume, the command above will help with that. For optional kicks you can put it into a script in /etc/pm/sleep.d/ (aspect in #swhack wrote this for me)
This is sample output - yours may be different.
-1

top -bn 1 | awk '{if($1 ~ /^[0-9]+$/ && $9 > 97) {print $1;exit}}'|xargs kill

chx · 2010-06-02 13:51:40 5
Enabling some DVD playback enhancements in Ubuntu

This command works at least in 9.04+
This is sample output - yours may be different.
-1

sudo sh /usr/share/doc/libdvdread4/install-css.sh

dddddsadasdasd · 2010-11-14 00:00:55 3
truncate half of `input.txt`
This is sample output - yours may be different.
-1

dd of=output.txt if=input.txt ibs=1 skip=$(expr `stat -c%s input.txt` / 2)

kev · 2011-07-10 12:04:48 7
Clean-up release directories keeping the only the latest two

Deletes capistrano-style release directories (except that there are dashes between the YYYY-MM-DD) Show Sample Output
This is sample output - yours may be different.
```
user@server:~/apps/appname/releases$ ls
2010-12-02-121502  2010-12-01-215457
```
-1

find . -maxdepth 1 -type d | grep -Pv "^.$" | sort -rn --field-separator="-" | sed -n '3,$p' | xargs rm -rf

wilmoore · 2011-03-08 17:38:26 6
Share your terminal session real-time

After installing Termbeamer (see termbeamer.com) you can use it to share a terminal session with one or more others even from behind a firewall or NAT.
This is sample output - yours may be different.
-1

tb send xmpp:user.name@gmail.com

unixmonkey52862 · 2013-04-08 00:29:43 5
Undo Mercurial add before commit

Undo accidental file add to mercurial. This command undo file adds to all recent adds
This is sample output - yours may be different.
-1

hg st --added -n |xargs hg revert

yrcjaya · 2011-06-01 19:54:41 3
Remove color codes (special characters) with sed

Handles the color codes intended for 256-color terminals (such as xterm-(256)color and urxvt-unicode-256color), in addition to the standard 16-color ANSI forms. Overkill for strict ANSI output, see other options for something simpler.
This is sample output - yours may be different.
-1

sed -r "s/\x1B\[([0-9]{1,2}(;[0-9]{1,2})?)?[m|K]//g"

rcbarnes · 2012-06-12 11:20:46 7
Print environment information.
This is sample output - yours may be different.
-1

printenv

tatwright · 2012-10-14 17:47:18 4
find all file larger than 500M in home dir

Find all files larger than 500M in home directory and print them ordered by size with full info about each file. Show Sample Output
This is sample output - yours may be different.
```
1688484 -rw-rw-r-- 1 marcanuy marcanuy 1729003520 Mar 23  2013 /home/marcanuy/backups/docs-20130323.tar.gz
4300700 -rw-rw-r-- 1 marcanuy marcanuy 4403912324 Mar 24  2013 /home/marcanuy/backups/full-20130323.tar.gz
```
-1

find ~ -type f -size +500M -exec ls -ls {} \; | sort -n

marcanuy · 2013-11-17 13:13:14 6
Show number of connections per remote IP

Output contains also garbage (text parts from netstat's output) but it's good enough for quick check who's overloading your server.
This is sample output - yours may be different.
-1

netstat -antu | awk '{print $5}' | awk -F: '{print $1}' | sort | uniq -c | sort -n

wejn · 2013-04-08 19:46:41 9
Monitors battery usage (rate of energy charge/discharge)

Needs to be run in a battery sysfs dir, eg. /sys/class/power_supply/BAT0 on my system. Displays the battery's current charge and the rate per-second at which energy is {dis,}charging. All values are displayed as percentages of "full" charge. The first column is the current charge. The second is the rate of change averaged over the entire lifetime of the command (or since the AC cable was {un,}plugged), and the third column is the rate of change averaged over the last minute (controlled by the C=60 variable passed to awk). The sample output captures a scenario where I ran 'yes' in another terminal to max out a CPU. My battery was at 76% charge and you can see the energy drain starts to rise above 0.01% per-second as the cpu starts working and the fan kicks in etc. While idle it was more like 0.005% per-second. I tried to use this to estimate the remaining battery life/time until fully charged, but found it to be pretty useless... As my battery gets more charged it starts to charge slower, which meant the estimate was always wrong. Not sure if that's common for batteries or not. Show Sample Output
This is sample output - yours may be different.
```
 76 -00.00570 -00.00688
 76 -00.00567 -00.00626
 76 -00.00585 -00.00751
 76 -00.00582 -00.00751
 76 -00.00589 -00.00813
 76 -00.00585 -00.00751
 76 -00.00602 -00.00876
 76 -00.00599 -00.00876
 76 -00.00606 -00.00939
 76 -00.00603 -00.00876
 76 -00.00619 -00.01001
```
-1

while cat energy_now; do sleep 1; done |awk -v F=$(cat energy_full) -v C=60 'NR==1{P=B=$1;p=100/F} {d=$1-P; if(d!=0&&d*D<=0){D=d;n=1;A[0]=B=P}; if(n>0){r=g=($1-B)/n;if(n>C){r=($1-A[n%C])/C}}; A[n++%C]=P=$1; printf "%3d %+09.5f %+09.5f\n", p*$1, p*g, p*r}'

sqweek · 2015-09-19 15:45:40 11
bkup the old files

U have to make key exchange in order to avoid continuous password prompt. Show Sample Output
This is sample output - yours may be different.
```
[root@localhost ~]# find /home/ -type f -mtime +30 -exec scp -r {} root@myhost:/data/bkup \;
.bash_history                                 100%  639     0.6KB/s   00:00
saved_state                                   100%   41KB  41.4KB/s   00:00
......
```
-1

find <dir> -type f -mtime +<days> -exec scp -r {} user@backuphost:/data/bkup \;

rbattu · 2009-02-12 07:43:29 12
search for a file (with regex), choose one then open it

lists the files found by find, waits for user input then uses xdg-open to open the selected file with the appropriate program. usage: findopen path expression [command] With the third optional input you can specify a command to use other than xdg-open, for example you could echo the filename to stdout then pipe it to another command. To get it to work for files with spaces it gets a bit messier... findopen() { files=( $(find "$1" -iname "$2" | tr ' ' '@') ); select file in "${files[@]//@/ }"; do ${3:-xdg-open} "$file"; break; done } You can replace the @ with any character that probably wont be in a file name.
This is sample output - yours may be different.
-1

findopen() { local PS3="select file: "; select file in $(find "$1" -iname "$2"); do ${3:-xdg-open} $file; break; done }

quigybo · 2010-02-28 02:28:59 3
Monitoring TCP connections number

Monitoring TCP connections number showing each state. It uses ss instead of netstat because it's much faster with high trafic. You can fgrep specific ports by piping right before awk: watch "ss -nat | fgrep :80 | awk '"'{print $1}'"' | sort | uniq -c" Show Sample Output
This is sample output - yours may be different.
```
      3 CLOSE-WAIT
      1 CLOSING
   1013 ESTAB
      6 FIN-WAIT-1
     29 FIN-WAIT-2
     20 LISTEN
      1 State
    323 TIME-WAIT
```
-1

watch "ss -nat | awk '"'{print $1}'"' | sort | uniq -c"

ricardofunke · 2012-12-07 19:07:33 8
View the newest xkcd comic.

Same thing just a different way to get there. You will need lynx
This is sample output - yours may be different.
-1

lynx --dump --source http://www.xkcd.com | grep `lynx --dump http://www.xkcd.com | egrep '(png|jpg)'` | grep title | cut -d = -f2,3 | cut -d '"' -f2,4 | sed -e 's/"/|/g' | awk -F"|" ' { system("display " $1);system("echo "$2); } '

solarislackware · 2009-12-03 18:53:57 3
pid list by httpd listen port

% lsof -v lsof version information: revision: 4.78
This is sample output - yours may be different.
-1

lsof | awk '/*:https?/{print $2}' | sort -u

sugitaro · 2011-02-04 01:37:17 3
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a for loop with filling 0 format, with seq

seq allows you to format the output thanks to the -f option. This is very useful if you want to rename your files to the same format in order to be able to easily sort for example: $for i in `seq 1 3 10`; do touch foo$i ;done And $ls foo* | sort -n foo1 foo10 foo4 foo7 But: $for i in `seq -f %02g 1 3 10`; do touch foo$i ;done So $ls foo* | sort -n foo01 foo04 foo07 foo10

Install pip with Proxy

Installs pip packages defining a proxy

Open files in a split windowed Vim

-o acts like :spit. Use -O (capital o) for side-by-side like :vsplit. Use vim -d or vimdiff if you need a diff(1) comparison. To split gnu Screen instead of vim, use ^A S for horizontal, ^A | for vertical.

check open ports without netstat or lsof

pulsed terminal clock

hypnotizing pendulum

Find the package that installed a command

Generate White Noise

This command will generate white noise through your speakers (assuming you have sound enabled). It's good for staying focused, privacy, coping with tinnitus, etc. I use it to test that the sound works.

search office documents for credit card numbers and social security number SSN docx xlsx

# CC with SSN dash ( low false positive only match ###-##-#### not any 8digi number ) $ find . -iname "*.???x" -type f -exec unzip -p '{}' '*' \; | sed -e 's/]\{1,\}>/ /g; s/[^[:print:]]\{1,\}/ /g' | egrep "\b4[0-9]{12}(?:[0-9]{3})?\b|\b5[1-5][0-9]{14}\b|\b6011[0-9]{14}\b|\b3(?:0[0-5]\b|\b[68][0-9])[0-9]{11}\b|\b3[47][0-9]{13}\b|\b[0-9]{3}-[0-9]{2}-[0-9]{4}\b" $ rmccurdyDOTcom

Brute force discover

Show the number of failed tries of login per account. If the user does not exist it is marked with *.

tcmdump check ping

capture only ping echo requests with tcpdump

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