Commands by spandana (0)

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find and reduce 8x parallel the size of JPG images without loosing quality via jpegoptim

Download entire website for offline viewing
?mirror : turn on options suitable for mirroring. -p : download all files that are necessary to properly display a given HTML page. ?convert-links : after the download, convert the links in document for local viewing. -P ./LOCAL-DIR : save all the files and directories to the specified directory.

tar the current directory wihtout the absolute path
tars the current directory (and its children) in an archive of the same name (plus ".tar" :)) in the parent directory without the absolute path, so that when the archive is extracted, only the current directory name is created for the path. Assumes bash/zsh.

copy last command to clipboard
Copy the last command to clipboard (os x)

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

Selecting a random file/folder of a folder
Also looks in subfolders

easily find megabyte eating files or directories

Extract the MBR ID of a device
Useful when you want to know the mbrid of a device - for the purpose of making it bootable. Certain hybridiso distros, for eg the OpenSUSE live ISO uses the mbrid to find the live media. Use this command to find out the mbrid of your USB drive and then edit the /grub/mbrid file to match it.

count how many cat processes are running
'ps ax' provides the fill list of running processes. 'grep -c [c]at' will find all processes that match 'cat' without matching itself....

Sending a file over icmp with hping
you need to start a listening hping on the reciever: hping3 --listen 10.0.2.254 -I eth0 --sign MSGID1 then you can send your file: hping3 10.0.2.254 --icmp --sign MSGID1 -d 50 -c 1 --file a_file


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