How to run multiple commands at once in Linux?

Answer:

You can separate the commands by a semicolon ;

e.g.

cat foo.txt; cat bar.txt


Two commands will be executed one by one.

However, if you want to execute a command if and only if previous command is executed successfully, then you can use && to separate them

e.g.

make && make install


So if make failed, make install will not be executed.