touch one two three → Create 3 files
mkdir folder → Make directory
mv -R / cp -R → Move or copy folder including subfolders
find . -name "george" → Search from current directory
locate → Faster, but relies on a database
updatedb → Update the locate database
Wildcards
| Symbol | Meaning |
|---|---|
| * | Zero or more characters |
| ? | Single character |
| [] | Range of characters |
| \ | Escape character |
| ^ | Beginning of the line |
| \$ | End of the line |
ls -l → Listpwd → Print working directorydr-xr-xr-x
|
directories
-rw-r--r--
|
file
| Symbol | Type |
|---|---|
| - | Regular file |
| d | Directory |
| l | Link |
| c | Special file or device file |
| s | Socket → Network communication / process data between external processes |
| p | Named pipe → FIFO → First In First Out, data between internal processes |
| b | Block device |
Inode = Pointer or number of a file on a hard disk.
/boot -> Grub.cfg
/root -> home of root
/dev -> system device (mouse, keyboard)
/etc -> configuration files
/bin -> /usr/bin -> everyday user commands
/sbin -> /usr/sbin -> system/filesystem commands
/opt -> third party app (not part of os)
/proc -> running process (only in memory)
/lib -> /usr/lib -> C prog lib
/tmp -> temporary folder
/home -> user dir
/var -> system logs
/run -> system daemon -> store temporary runtime / PID file
/mnt -> mount external file system
/media -> CDrom
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