Commands by samvila (0)

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Change the extension of a filename by using rename to convert
This will change all files ending in .JPG to .jpg and will work with any file extension

IFS - use entire lines in your for cycles
When you use a "for" construct, it cycles on every word. If you want to cycle on a line-by-line basis (and, well, you can't use xargs -n1 :D), you can set the IFS variable to .

Show biggest files/directories, biggest first with 'k,m,g' eyecandy
I use this on debian testing, works like the other sorted du variants, but i like small numbers and suffixes :)

Print just line 4 from a textfile
this method should be the fastest

Remove a line from a file using sed (useful for updating known SSH server keys when they change)
For example, to remove line 5 from foo, type: vi +5d +wq foo

Jump up to any directory above the current one
Usage: upto directory

Display any tcp connections to apache
Sometimes apache will get stuck in an established state where you can't get a list of the connecting IP's from mod_status... not a good thing when you need to ban an abusive ip.

force a rescan on a host of scsi devices (useful for adding partitions to vmware on the fly)

To find the count of each open file on a system (that supports losf)

Listing today’s files only

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