Commands by reklis

Commands by reklis (3)

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Read multiple lines of a file based on regex matching a single line

Finds the line number matching the regex, then passes that to BC for some math, passes that to head, and uses tail to trim off the unwanted section at the top. The whole thing is spit out to a script that can then be shared or run. Comes in handy for reading select sections from error logs.
This is sample output - yours may be different.
-2

for i in `grep -n "SomeRegEx" foo.txt | sed 's/:/ /' | awk '{print $1}'`; do echo "head -n `echo "$i+4" | bc` foo.txt | tail -n 5"; done > headsandtails.sh

reklis · 2010-07-01 05:48:02 6
validate json

I have this saved as jsonlint chmodded +x and file.js is instead $1, but YMMV Show Sample Output
This is sample output - yours may be different.
```
{"result":"Valid JSON","responseCode":0}
```
3

curl -s -X POST http://www.jsonlint.com/ajax/validate -d json="`cat file.js`" -d reformat=no

reklis · 2010-03-16 20:39:43 11
Follow a new friend on twitter

replace username, password, and nameofnewfriend with proper values. Remember to escape things like ! or & in your password
This is sample output - yours may be different.
1

curl -u USERNAME:PASSWORD -d "" http://twitter.com/friendships/create/NAMEOFNEWFRIEND.xml?follow=true

reklis · 2009-02-20 14:30:57 5

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convert hex to decimal ; decimal to hex

Fetch all GPG keys that are currently missing in your keyring

For instance, if people have signed your key, this will fetch the signers' keys.

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

Smart `cd`.. cd to the file directory if you try to cd to a file

This little function will smarten 'cd'. If you try to cd into a file (which I guess we all have done), it cd's into the directory of that file instead. I had to use nesten if's, to get cd to still work with 'cd' (to get to $HOME), 'cd -' (to get to last directory), and 'cd foo\ bar'.

Schedule a script or command in x num hours, silently run in the background even if logged out

This is helpful for shell scripts, I use it in my custom php install script to schedule to delete the build files in 3 hours, as the php install script is completely automated and is made to run slow. Does require at, which some environments without crontab still do have. You can add as many commands to the at you want. Here's how I delete them in case the script gets killed. (trapped) atq |awk '{print $1}'|xargs -iJ atrm J &>/dev/null

Symlink all files from a base directory to a target directory

txt2html

Convert Text to HTML

Email someone if a web page has been updated.

A cronjob command line to email someone when a webpages homepage is updated.

find geographical location of an ip address

I save this to bin/iptrace and run "iptrace ipaddress" to get the Country, City and State of an ip address using the http://ipadress.com service. I add the following to my script to get a tinyurl of the map as well: URL=`lynx -dump http://www.ip-adress.com/ip_tracer/?QRY=$1|grep details|awk '{print $2}'` lynx -dump http://tinyurl.com/create.php?url=$URL|grep tinyurl|grep "19. http"|awk '{print $2}'

Set CDPATH to ease navigation

CDPATH tells the cd command to look in this colon-separated list of directories for your destination. My preferred order are 1) the current directory, specified by the empty string between the = and the first colon, 2) the parent directory (so that I can cd lib instead of cd ../lib), 3) my home directory, and 4) my ~/projects directory.

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