Steam安裝：

• 官網下載deb包

sudo dpkg -i filename.deb如果報錯：missing lib32 .....libGL.so.1 and libdrm.so.2

在安裝好後：

• Check your default Architecture by using:

sudo dpkg --print-architecture

• You will get your default Architecture which would be amd64.
• We need to add i386 Architecture.
• Use this code:

sudo dpkg --add-architecture i386

• Just to verify that it has been added successfully, use this code:

sudo dpkg --print-foreign-architectures

• If it has been added, proceed to update in order to get the 32 bit packages.

Use Code:sudo apt update

• Now try installing steam from the updated repository.

sudo apt-get install steam

• Since steam is not permitted to run as root by default.

It is advised to run steam as a non-root user.
Just create a non-root user and run steam from that, you should be okay.If you are persistent, follow these steps:
1.Open /usr/bin/steam
nano /usr/bin/steam
2.Comment or Delete these lines:
if [ "$(id -u)" == "0" ]; then
show_message --error $"Cannot run as root user"
exit 1
fi
3.Open steam.It is working!!!

Steam解除安裝：

1. sudo apt-get remove steam

#Purge Steam Perfectly with Configuration files with the following

2. sudo apt-get purge steam sudo dpkg --print-architecture

#delete its directory located at home folder
3.rm -rf ~/.local/share/Steam && rm -rf ~/.steam