Commands by thirtysixthspan (1)

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watch snapshots commit in VMware ESX
To monitor .vmdk files during snapshot deletion (commit) on ESX only (ESXi doesn't have the watch command): 1. Navigate to the VM directory containing .vmdk files. # watch "ls -tough --full-time *.vmdk" where: -t sorts by modification time -o do not list group information (to narrow the output) -u sorts by access time -g only here for the purpose to easily remember the created mnemonic word 'tough' -h prints sizes in human readable format (e.g., 1K 234M 2G) --full-time sets the time style to full-iso and does not list user information (to narrow the output) optionally useful parameters to the watch command: -d highlight changes between updates -n seconds to wait between updates (default is 2) -t turn off printing the header

run command on a group of nodes in parallel
Parallel is from https://savannah.nongnu.org/projects/parallel/ Other examples would be: (echo foss.org.my; echo www.debian.org; echo www.freenetproject.org) | parallel traceroute seq -f %04g 0 9999 | parallel -X rm pict{}.jpg

Copy your SSH public key on a remote machine for passwordless login.
Should run on any system with ssh installed.

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

List just the executable files (or directories) in current directory
A bit shorter ;)

See the top 10 IP addresses in a web access log

processes per user counter
awk is evil!

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.

Find the package that installed a command

Count number of files in a directory
Just want to post a Perl alternative. Does not count hidden files ('.' ones).


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