Commands by point_to

Commands by point_to_null (9)

sorted by

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 16
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 11
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 5
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 10
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 2
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 8
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 7
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 3
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 10

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

sync two folders except hidden files

How to copy CD/DVD into hard disk (.iso)

A dear friend of mine asked me how do I copy a DVD to your hard drive? If you want to make a copy of the ISO image that was burned to a CD or DVD, insert that medium into your CD/DVD drive and (assuming /dev/cdrom is associated with your computer?s CD drive) type the following command

Mount important virtual system directories under chroot'ed directory

The command is useful when, e.g., booting an existing system with a rescue or installation CD where you need to chroot into the hard-disk and be able to do stuff which accesses kernel info (e.g. when installing Ubuntu desktop with LVM2 you need to mount and chroot the hard disk from a shell window in order to install packages and run initramfs inside chroot). The command assumes that /mnt/xxx is where the chroot'ed environment's root file system on the hard disk is mounted.

Calculate days on which Friday the 13th occurs (inspired from the work of the user justsomeguy)

Friday is the 5th day of the week, monday is the 1st. Output may be affected by locale.

Scan your LAN for unauthorized IPs

populate the auth.hosts file with a list of IP addresses that are authorized to be in use and when you run this command it will return the addresses that are pingable and not in the authorized list. Can be combined with the "Command line Twitter" command to tweet unauthorized access.

List status of your git repos and let us know if there is any new files to commit.

Source: http://www.bashoneliners.com/oneliners/oneliner/225/

convert .bin / .cue into .iso image

bchunk [-v] [-p] [-r] [-w] [-s]

Set all CPU cores' CPU frequency scaling governor to maximum performance

Detect illegal access to kernel space, potentially useful for Meltdown detection

Based on capsule8 agent examples, not rigorously tested

Change the case of a single word in vim

In edit mode, toggle the case of a single word under the cursor in vim.

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)
» commands by point_to_null