Commands by chutsu (1)

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Extract raw URLs from a file
you can also use cut instead of awk. less powerful but probably faster. ;)

Get the 10 biggest files/folders for the current direcotry
This command simply outputs 10 files in human readable, that takes most space on your disk in current directory.

Embed next line on the end of current line using sed
N: On the current line, sed will display it on pattern space, plus a \n (new line); but s/\n//: Will get rid of new line displayed on pattern space, joining the current line's end with the start of the next line Useful in scripts.

wget download with multiple simultaneous connections

check open ports without netstat or lsof

Recursive search and replace (with bash only)
Replaces a string matching a pattern in one or several files found recursively in a particular folder.

SSH connection through host in the middle

list block devices
Shows all block devices in a tree with descruptions of what they are.

Counting the source code's line numbers C/C++ Java
Count your source and header file's line numbers. This ignores blank lines, C++ style comments, single line C style comments. This will not ignore blank lines with tabs or multiline C style comments.

Print the last modified file

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