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Find files and calculate size of result in shell
Use find's internal stat to get the file size then let the shell add up the numbers.

Create a nifty overview of the hardware in your computer
After the command is done, open the html file in a browser

run shell with your commandlinefu.com's favourites as bash_history
This makes your commandlinefu.com's favorites appear as most recent commands in your history.

List all files in a folder in a git repository by last commit date
This lists all the files in a folder, then finds the commit date for them one by one, then sorts them from newest to oldest

Command for JOHN CONS
Would create a file with a meaningful title. Dedicated to John Cons, who is annoying us users. Merry Christmas!!!

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

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Reduce PDF size

list block devices
Shows all block devices in a tree with descruptions of what they are.

Get AWS temporary credentials ready to export based on a MFA virtual appliance
You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials


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