"What if you wanted to run a command and when it finished, run another? Linux provides three ways to do this with a slightly different end result. The semicolon (;), ampersand (&) and the verticle pipe (|) all help the user "chain" commands together.
"In this example we are using the semicolon (;) to separate these two commands. Using a semicolon tells the shell, "once the first command finishes, run the second one". Once apt-get update finishes, the system will then run it again using the upgrade option.
"[user@localhost ~/project1]$ ./configure && make && make install
"This command is mainly used by developers, software package maintainers and Linux power users. This chain of commands compiles a program and installs it. What the double-ampersands are telling the system is "wait for the first command to successfully complete. If it does complete successfully, run the next command".
