Convert to upper or lower case in shell

convert string to upper or lower case in shell script

convert string to upper case
echo aBcD | tr '[:lower:]' '[:upper:]'

convert string to lower case
echo aBcD | tr '[:upper:]' '[:lower:]'

Delete windows recovery partition

 Run in terminal as admin: Diskpart list disk select disk 0 list partition select partition X delete partition override

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