The curl command retrieve the HTML text containing the IP address. The grep command picks out the IP address from that HTML text.

This is one way to find out.

This is a simple command for jumping to the matching brace, square bracket, or parentheses. For example, it can take you from the beginning of a function to the end with one key stroke. To delete everything between the pairs of {}, [], or (), issue the command:

To replace text between pairs of braces, brackets, or parentheses, issue the command:

You can also use this command to find out if an opening brace has been properly closed.

Get max number of arguments that can be accepted by the exec() system call.

Scan for viruses, recursively and print only infected files, with bell sound. Clamscan is part of clamav package. Tested on Debian.

The "pstree" command uses special line-drawing characters. However, when piped into the "less" pager, these are normally disabled.

This uses Bash's "process substitution" feature to compare (using diff) the output of two different process pipelines.

Get your colorized grep output in less(1). This involves two things: forcing grep to output colors even though it's not going to a terminal and telling less to handle those properly.

The "find" command can be annoying when used inside of a Subversion (or CVS) working directory. Obviously, you can combine this with other predicates and commands to create a more elaborate pipeline:

Note: You can use my "dont-go-there.sh" script to wrap the "find" command and do this automatically at http://forwardlateral.com/blog/2006/02/27/dont-go-there/

-l outputs only the file names

-i ignores the case

-r descends into subdirectories

Displays SuSE release information

I find that I create a directory and then cd into that directory quite often. I found this little function on the internets somewhere and thought I'd share it. Just copy-paste it into you ~/.bash_profile and then `source ~/.bash_profile`.

get a list of temps of your hard-drives.

Unset TMOUT or set it to 0 in order to prevent shell autologout. TMOUT is the number of seconds after which the present shell will be killed if it has been idle for that long.

this will cause any commands that you have executed in the current shell session to not be written in your bash_history file upon logout

Replace * with any filename matching glob or an individual filename

the maven.test.skip property can be added to other goals too.

This will create a new directory called MyProject with a pom.xml and the following tree structure:

MyProject

|-->pom.xml

|-->src

| |-->main

| | |-->java

| | | |-->my

| | | | |-->work

| | | | | |-->App.java

| |-->test

| | |-->java

| | | |-->my

| | | | |-->work

| | | | | |-->AppTest.java

This command create a new temp directory using mktemp (to avoid collisions) and change the current working directory to the created directory.

convert mixed case in a file to lower case

Per default, linux/unix shells are configured with a width of 80 characters.

If you like to edit a phrase or string on a line with more than 80 characters it might take long to go there (for example a line with 1000 characters and you like to edit the 98th word which is character 598-603).

Maybe you might wish to use 78 characters, because if you forward the text via mail and the text will be quoted (2 extra characters at the beginning to the line "> "), you use 80 characters, otherwise 82, which are lame.