UnZip and UnCompress

xz-utils: 
 You will need xz-utils if you dont have it already. If not, You have to install xz-utils package first: 
 sudo apt-get install xz-utils 
 
 You can use unxz command to extract .xz files: 
 unxz file.xz 
 or using with --decompress option of xz: 
 xz --decompress file.xz 
 
 7 Zip 
 You will need 7zipif you dont have it already. If not, You have to install xz-utils package first: 
 sudo apt install p7zip 
 Then, uncompress using the  -d  command: 
 p7zip -d something.7z