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Access to specific man page section
You can view the man pages from section five by passing the section number as an argument to the man command

grep for minus (-) sign
Use flag "--" to stop switch parsing

resize all JPG images in folder and create new images (w/o overwriting)
Convert all jpegs in the current directory into ~1024*768 pixels and ~ 150 KBytes jpegs

Install pip with Proxy
Installs pip packages defining a proxy

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

Delete all files by extension
This is a correction to https://www.commandlinefu.com/commands/view/22134 Use `-name` instead of `-iname`, because case-sensitivity is probably important when we're dealing with filenames. It's true that extensions are often capitalised (e.g., "something.JPG"), so choose whatever's appropriate. However, what is appropriate is the quoting of the name pattern, so the shell doesn't expand it incorrectly. Finally, `-delete` is clearer.

Set all CPU cores' CPU frequency scaling governor to maximum performance

Resets a terminal that has been messed up by binary input

Check if you partition are aligned
To get most of you HDD/SSD driver you need to make sure you partition are aligned, if not the speed penalty can be up to 50% slower! this simple one liner will check to see if each partition start sector is divided by 512 you need to change sda with your driver if you find the one of your partitions is not aligned use gparted to move the start sector of the partition to be divided of 512

Sysadmin day date of any given year
Calculate the date of Sysadmin day (last Friday of July) of any given year


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