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Display which distro is installed

remote diff with side-by-side ordering.
more information: man sdiff

See system users

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

Convert multiple flac files to mp3
make sure that flac and lame are installed sudo apt-get install lame flac

gets your public IP address

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

Google text-to-speech in mp3 format

Find the package that installed a command

recursively change file name from uppercase to lowercase (or viceversa)
easier way to recursively change files to lowercase using rename instead


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