Commands using install (65)

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Poor man's nmap for a class C network from rfc1918
What do you do when nmap is not available and you want to see the hosts responding to an icmp echo request ? This one-liner will print all hosts responding with their ipv4 address.

Print a row of 50 hyphens
essentially the ruby one, but perhaps has a larger installed base

Generate a random password 30 characters long

Calculate days on which Friday the 13th occurs (inspired from the work of the user justsomeguy)
Friday is the 5th day of the week, monday is the 1st. Output may be affected by locale.

Create a large test file (taking no space).

Display BIOS Information

Resize A Mounted EXT3 File System
Live extension of an ext3 file system on logical volume $v by 200GB without the need to unmount/remount. Requires that you have 1) a version of resize2fs that contains code merged from ext2online, and 2) kernel support for online resizing. (e.g. RHEL 5)

Remove a range of lines from a file

back ssh from firewalled hosts
host B (you) redirects a modem port (62220) to his local ssh. host A is a remote machine (the ones that issues the ssh cmd). once connected port 5497 is in listening mode on host B. host B just do a ssh 127.0.0.1 -p 5497 -l user and reaches the remote host'ssh. This can be used also for vnc and so on.

split a multi-page PDF into separate files
Simple alternative to the previous submitted one


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