Commands by SuperJediWombat

Commands by SuperJediWombat (7)

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Get your external IP address without curl

Curl is not installed by default on many common distros anymore. wget always is :) wget -qO- ifconfig.me/ip
This is sample output - yours may be different.
12

wget -qO- icanhazip.com

SuperJediWombat · 2010-06-24 03:49:14 7
grep for tabs without using Ctrl-V trick

-P tells grep to use perl regex matches (only works on the GNU grep as far as I know.)
This is sample output - yours may be different.
3

grep -P '\t' filename

SuperJediWombat · 2010-05-02 02:24:14 2
kill process by name

Or even easier, if it's available: killall firefox I have no idea why you would want to rely on two unusual dependencies to do something that can be done a hundred ways from coreutils...
This is sample output - yours may be different.
14

pkill -x firefox

SuperJediWombat · 2010-05-02 02:17:21 5
Remove comments and empty lines from a file

Removes all empty lines: ^$ and all lines starting with hash: ^# Show Sample Output
This is sample output - yours may be different.
```
/dev/sdd {
spindown_time = 241
}
/dev/sdf {
spindown_time = 241
}
```
0

grep -v '^#\|^$' /etc/hdparm.conf

SuperJediWombat · 2010-04-18 08:01:07 2
Ping scanning without nmap

Usefull for when you don't have nmap and need to find a missing host. Pings all addresses from 10.1.1.1 to 10.1.1.254, modify for your subnet. Timeout set to 1 sec for speed, if running over a slow connection you should raise that to avoid missing replies. This will clean up the junk, leaving just the IP address: for i in {1..254}; do ping -c 1 -W 1 10.1.1.$i | grep 'from' | cut -d' ' -f 4 | tr -d ':'; done Show Sample Output
This is sample output - yours may be different.
```
64 bytes from 10.1.1.1: icmp_seq=1 ttl=255 time=0.622 ms
64 bytes from 10.1.1.2: icmp_seq=1 ttl=64 time=0.078 ms
64 bytes from 10.1.1.50: icmp_seq=1 ttl=128 time=0.204 ms
64 bytes from 10.1.1.250: icmp_seq=1 ttl=128 time=0.344 ms
```
14

for i in {1..254}; do ping -c 1 -W 1 10.1.1.$i | grep 'from'; done

SuperJediWombat · 2010-04-07 16:57:53 5

Print Asterisk phone logs

Prints a log of phonecalls placed from/to an asterisk server, formated into an easily readable table. You can use partial number/queue matches, or use .* to match everything. Show Sample Output

phonelogs() { grep "$1" /var/log/asterisk/cdr-csv/Master.csv | cut -d',' -f 2,3,11,12 --output-delimiter=" " | sed 's/"//g' | cut -d' ' -f 1,2,3,4,6 | column -t; }

SuperJediWombat · 2010-03-28 08:30:46 16

show your private/local ip address

Gets the IP addresses of all interfaces except loopback. Cuts out all of the extra text. Shorter than the other options, and much easier to type. 'ifconfig | grep cast' is enough to get the IP address, but it doesn't strip the rest of the junk out. Show Sample Output
This is sample output - yours may be different.
```
10.10.10.2
10.10.20.250
```
0

ifconfig | grep cast | cut -d':' -f2 | cut -d' ' -f1

SuperJediWombat · 2010-03-28 02:15:34 2

What's this?

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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"

Set an alarm to wake up

Sleep 5h and plays the song as a wake up alarm

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"

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

A function to output a man page as a pdf file

Tested on Fedora 12. This function will take a man page and convert it to pdf, saving the output to the current working directory. In Gnome, you can then view the output with "gnome-open file.pdf", or your favorite pdf viewer.

Know which modules are loaded on an Apache server

This let you know which modules has loaded the Apache server, very useful to know if the mod_rewrite is ready to use.

Convert seconds to [DD:][HH:]MM:SS

Capitalize first letter of each word in a string

Capitalize first letter of each word in a string.

Check for login failures and summarize

This command checks for the number of times when someone has tried to login to your server and failed. If there are a lot, then that user is being targeted on your system and you might want to make sure that user either has remote logins disabled, or has a strong password, or both. If your output has an "invalid" line, it is a summary of all logins from users that don't exist on your system.

gain all mp3s in subfolders w/o encoding

This will search all subfolders for mp3's and gain them to more or less sane defaults (without reencoding). http://mp3gain.sourceforge.net/ required!

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