Commands by point_to

Commands by point_to_null (9)

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du with colored bar graph

A more efficient way, with reversed order to put the focus in the big ones. Show Sample Output
This is sample output - yours may be different.
```
 41.37% ############################################################## Others
 17.96% ########################### Woody Allen
 13.19% #################### Argentina
 10.86% ################ Ingmar Bergman
  6.55% ########## Serbia
  3.92% ###### NI
  2.24% ### Luis Bu?uel
  0.95% # Jean Renoir
  0.66% # M?xico
  0.64% # Colombia
  0.45% # Charlie Chaplin
  0.45% # Leni Riefenstahl
  0.42% # Cuba
  0.36% # Chile
```
12

du -x --max-depth=1|sort -rn|awk -F / -v c=$COLUMNS 'NR==1{t=$1} NR>1{r=int($1/t*c+.5); b="\033[1;31m"; for (i=0; i<r; i++) b=b"#"; printf " %5.2f%% %s\033[0m %s\n", $1/t*100, b, $2}'|tac

point_to_null · 2015-09-12 10:36:49 22
Print diagram of user/groups

Parses /etc/group to "dot" format and pases it to "display" (imagemagick) to show a usefull diagram of users and groups (don't show empty groups).
This is sample output - yours may be different.
19

awk 'BEGIN{FS=":"; print "digraph{"}{split($4, a, ","); for (i in a) printf "\"%s\" [shape=box]\n\"%s\" -> \"%s\"\n", $1, a[i], $1}END{print "}"}' /etc/group|display

point_to_null · 2011-12-04 01:56:44 15
Draw kernel module dependancy graph.

parse "lsmod" output to "dot" format and pass it to "display". Without perl!
This is sample output - yours may be different.
15

lsmod | awk 'BEGIN{print "digraph{"}{split($4, a, ","); for (i in a) print $1, "->", a[i]}END{print "}"}'|display

point_to_null · 2011-12-04 01:41:23 8
Show bandwidth use oneliner

poorman's ifstat using just sh and awk. You must change "eth0" with your interface's name. Show Sample Output
This is sample output - yours may be different.
```
02:18:43     1.71 KiB/s in     0.11 KiB/s out
02:18:44     0.75 KiB/s in     0.25 KiB/s out
02:18:45     0.47 KiB/s in     0.20 KiB/s out
02:18:46     0.59 KiB/s in     0.15 KiB/s out
02:18:47     1.12 KiB/s in     1.37 KiB/s out
02:18:48     0.65 KiB/s in     0.21 KiB/s out
02:18:49     0.50 KiB/s in     0.31 KiB/s out
02:18:50     1.28 KiB/s in     0.37 KiB/s out
02:18:51     0.50 KiB/s in     0.05 KiB/s out
02:18:52     2.26 KiB/s in     0.10 KiB/s out
```
10

while true; do cat /proc/net/dev; sleep 1; done | awk -v dc="date \"+%T\"" '/eth0/{i = $2 - oi; o = $10 - oo; oi = $2; oo = $10; dc|getline d; close(dc); if (a++) printf "%s %8.2f KiB/s in %8.2f KiB/s out\n", d, i/1024, o/1024}'

point_to_null · 2011-11-21 05:24:44 14
Limit bandwidth usage by any program

Trickle is a voluntary, cooperative bandwidth shaper. it works entirely in userland and is very easy to use. The most simple application is to limit the bandwidth usage of programs.
This is sample output - yours may be different.
7

trickle -d 60 wget http://very.big/file

point_to_null · 2010-03-29 06:55:30 6
Every Nth line position # (AWK)

A better way to show the file lines 3n + 1
This is sample output - yours may be different.
4

awk 'NR%3==1' file

point_to_null · 2010-01-08 18:52:24 10
A fun thing to do with ram is actually open it up and take a peek. This command will show you all the string (plain text) values in ram

cat? dd? RTFM
This is sample output - yours may be different.
27

sudo strings /dev/mem

point_to_null · 2009-08-09 02:07:26 20
Remove newlines from output

?Cat and grep? You can use only grep ("grep \. filename"). Better option is awk.
This is sample output - yours may be different.
1

awk /./ filename

point_to_null · 2009-08-09 02:04:46 4
Brute force discover

Show the number of failed tries of login per account. If the user does not exist it is marked with *. Show Sample Output
This is sample output - yours may be different.
```
$ sudo zcat /var/log/auth.log.*.gz | awk '/Failed password/&&!/for invalid user/{a[$9]++}/Failed password for invalid user/{a["*" $11]++}END{for (i in a) printf "%6s\t%s\n", a[i], i|"sort -n"}'
    33  *abc
    35  *upload
    36  *sales
    39  *center
    40  *web
    43  *fax
    43  *public
    48  *asterisk
    48  *office
    48  *temp
    53  *test
    59  *admin
    65  *info
    69  *postgres
    74  *oracle
   541  root
```
24

sudo zcat /var/log/auth.log.*.gz | awk '/Failed password/&&!/for invalid user/{a[$9]++}/Failed password for invalid user/{a["*" $11]++}END{for (i in a) printf "%6s\t%s\n", a[i], i|"sort -n"}'

point_to_null · 2009-03-21 06:41:59 17

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wget progress bar with customized data size for dots

View files opened by a program on startup and shutdown

Run this before you run a command in order to see what the command does as it starts. The -c flag is useful here as the PID is unknown before startup. All config files, libraries, logs, ports, etc used by the command as it starts up, (and shuts down) will be captured at 1s intervals and written to a file. Useful for debugging etc.

Find the package that installed a command

Download Englishword pronounciation as mp3 file

Remove security limitations from PDF documents using ghostscript

Remove security from PDF document using this very simple command on Linux and OSX. You need ghostscript for this baby to work.

total text files in current dir

Use nroff to view the man pages

Using nroff , it is possible to view the otherwise garbled man page with col command.

Terminal Escape Code Zen - Strace and Tput

Depending on the TERM, the terminfo version, ncurses version, etc.. you may be using a varied assortment of terminal escape codes. With this command you can easily find out exactly what is going on.. This is terminal escape zen! $ ( 2>&2 strace -f -F -e write -s 1000 sh -c 'echo -e "initc\nis2\ncnorm\nrmso\nsgr0" | tput -S' 2>&1 ) | grep -o '"\\[^"]*"' --color=always "\33]4;%p1%d;rgb:%p2%{255}%*%{1000}%/%2.2X/%p3%{255}%*%{1000}%/%2.2X/%p4%{255}%*%{1000}%/%2.2X\33\\\33[!p\33[?3;4l\33[4l\33>\33[?12l\33[?25h\33[27m\33(B\33[m" Lets say you want to find out what you need to echo in order to get the text to blink.. $ echo -e "`tput blink`This will blink`tput sgr0` This wont" Now you can use this function instead of calling tput (tput is much smarter for portable code because it works differently depending on the current TERM, and tput -T anyterm works too.) to turn that echo into a much faster executing code. tput queries files, opens files, etc.. but echo is very strait and narrow. So now you can do this: $ echo -e "\33[5mThis will blink\33(B\33[m This wont" More at http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html

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"

SVN Clean

Removes all unversioned files and folders from an svn repository. Also: $ svn status --no-ignore | grep ^I | awk '{print $2}' | xargs rm -rf will remove those files which svn status ignores. Handy to add to a script which is in your path so you can run it from any repository (a la 'svn_clean.sh').

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