MIT课程笔记： Notes on Missing semester 04

Command-line Environment

Job Control

• lots of SIGNALS to control jobs

• The flowing commands show how to control jobs in terminal. KILL can be useful because it can send signals to the programs. bg can continue processes running on the background.

• why should we use nohup when closing the terminal?

• Because by default the hangup will terminate the job. So what nohup do is pretty simple, it actually ignore the hangup signal. But the KILL signal can’t be ignored no matter what.

Terminal Multiplexers

CORE Concept in Tmux

structure

Sessions

• Windows
  • Panes

what happens when we type tmux?

• In our shell, we started a process called tmux, and tmux started a different process which is the shell we are currently in.

The key bindings the core to use tmux efficiently

• form: prefix＋key

how to split the current display into panes?

• ctrl B + ": split horizontally
• ctrl B + %: split vertically
• ctrl B + arrow keys: navigate through different panes

So if you find panes are too small, how to deal with it?

• ctrl B + z: zoom out & zoom in

WHAT ACTUALLY DOES TMUX DO ?

• Give you a more convenient visual layout, that you can quickly manipulate through.
• if we start a tmux session, it won’t be affected by the ssh connections（hangup signal）.

Dot Files

what does Dot files do?

• how to configure your shell to do the things you want to do.
• mainly about how to do them quicker and in a more convenient way.

Remote Machines