Ctrl
Ctrl + a - Jump to the start of the line # 如果使用screen，C-a可能会被占用，请使用C-a a
Ctrl + e - Jump to the end of the line
Ctrl + k - Delete from cursor to EOL # 从cursor处(包括光标)直接删除到行尾，很管用的命令
Ctrl + u - Delete backward from cursor # 从cursor处(不包括光标)直接前面所有，适合输错密码时用
Ctrl + w - Delete a word
Ctrl + c - Terminate the command
Ctrl + d - Delete char under the cursor
Ctrl + b - Move back a char
Ctrl + f - Move forward a char
Ctrl + r - Search the history backwards
Ctrl + R - Search the history with multi occurrence # ???还不明白这个和C-r的区别
Ctrl + l - Clear the screen
Ctrl + z - Suspend/Stop the command
Meta
Meta + f - Move forward a word
Meta + b - Move backward a word
Bash Mode
TODO 待具体研究
set -o List all the modes
默认情况下，emacs mode是on，而vi mode是off，可以通过set -o vi改为vi mode