Commands by mheadd

Commands by mheadd (7)

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Find the annual salary of any White House staffer.

Query the Socrata Open Data API being used by the White House to find any employee's salary using curl, grep and awk. Change the value of the search parameter (example uses Axelrod) to the name of any White House staffer to see their annual salary. Show Sample Output
This is sample output - yours may be different.
```
"172200.00"
```
2

curl -s "http://www.socrata.com/api/views/vedg-c5sb/rows.json?search=Axelrod" | grep "data\" :" | awk '{ print $17 }'

mheadd · 2010-07-01 23:54:54 6
Kill multiple instances of a running process

Find and kill multiple instances of a process with one simple command.
This is sample output - yours may be different.
-3

pgrep rouge-process | xargs sudo kill -9

mheadd · 2010-05-09 22:30:05 6
Watch active calls on an Asterisk PBX

Show active calls as the happen on an Asterisk server. Note that the Asterisk command (in single quotes) is formatted for Asterisk 1.6. Use the -n flag on the watch command to modify the refresh period (in seconds - default is 2 seconds). Show Sample Output
This is sample output - yours may be different.
```
3 active calls
72 calls processed
```
7

watch -n 1 "sudo asterisk -vvvvvrx 'core show channels' | grep call"

mheadd · 2010-03-26 15:42:13 10
Get an IP address out of fail2ban jail

Removes an iptables rule created by fail2ban. This example shows how to remove a rule for an IP from the fail2ban-SSH chain. Can be used for any service monitored by fail2ban. For more on fail2ban, see http://www.fail2ban.org/wiki/index.php/Main_Page
This is sample output - yours may be different.
4

iptables -D fail2ban-SSH -s <ip_address_to_be_set_free> -j DROP

mheadd · 2009-05-08 19:22:15 3
Change the default editor for modifying the sudoers list.

On Ubuntu, the default editor for visudo is nano. To change the editor to something else (e.g., vi) use this command.
This is sample output - yours may be different.
2

sudo update-alternatives --config editor

mheadd · 2009-04-09 18:26:52 7
Get your Tweets from the command line

Gets the latest Tweets in your friends timeline from Twitter. Uses curl and xmlstarlet.
This is sample output - yours may be different.
4

curl -s -u user:password 'http://twitter.com/statuses/friends_timeline.xml?count=5' | xmlstarlet sel -t -m '//status' -v 'user/screen_name' -o ': ' -v 'text' -n

mheadd · 2009-02-23 17:30:24 8
Speak your horoscope with the command line

Uses curl, xmlstarlet and festival to speak your horoscope. Modify the m (month) and d (day) parameters to the astrology web service to hear your personal horoscope.
This is sample output - yours may be different.
-2

curl -s 'http://www.trynt.com/astrology-horoscope-api/v2/?m=2&d=23' | xmlstarlet sel -t -m '//horoscope' -v 'horoscope' | festival --tts

mheadd · 2009-02-23 16:52:06 12

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Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

How many Linux and Windows devices are on your network?

Shows how many Windows and Linux devices are on your network. May add support for others, but that's all that are on my network right now.

Create subdirectory and move files into it

With this form you dont need to cut out target directory using grep/sed/etc.

Redirect incoming traffic to SSH, from a port of your choosing

Stuck behind a restrictive firewall at work, but really jonesing to putty home to your linux box for some colossal cave? Goodness knows I was...but the firewall at work blocked all outbound connections except for ports 80 and 443. (Those were wide open for outbound connections.) So now I putty over port 443 and have my linux box redirect it to port 22 (the SSH port) before it routes it internally. So, my specific command would be: $iptables -t nat -A PREROUTING -p tcp --dport 443 -j REDIRECT --to-ports 22 Note that I use -A to append this command to the end of the chain. You could replace that with -I to insert it at the beginning (or at a specific rulenum). My linux box is running slackware, with a kernel from circa 2001. Hopefully the mechanics of iptables haven't changed since then. The command is untested under any other distros or less outdated kernels. Of course, the command should be easy enough to adapt to whatever service on your linux box you're trying to reach by changing the numbers (and possibly changing tcp to udp, or whatever). Between putty and psftp, however, I'm good to go for hours of time-killing.

Print a single route to a destination and its contents exactly as the kernel sees it

Useful to determine the source_ip of outgoing packages to a certain destination

Extract all of the files on an RPM on a non-RPM *nix

Update IP filter for qBittorrent

Downloads Bluetack's level 1 IP blocklist in .p2p format, suitable for various Bittorrent clients.

uniq for unsorted data

Find how far nested you are in subshells

Get your external IP address with a random commandlinefu.com command

There's been so many ways submitted to get your external IP address that I decided we all need a command that will just go pick a random one from the list and run it. This gets a list of "Get your external IP" commands from commanlinefu.com and selects a random one to run. It will run the command and print out which command it used. This is not a serious entry, but it was a learning exercise for me writing it. My personal favourite is "curl icanhazip.com". I really don't think we need any other ways to do this, but if more come you can make use of them with this command ;o). Here's a more useful command that always gets the top voted "External IP" command, but it's not so much fun: $ eval $(curl -s http://www.commandlinefu.com/commands/matching/external/ZXh0ZXJuYWw=/sort-by-votes/plaintext|sed -n '/^# Get your external IP address$/{n;p;q}')

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