Commands Basic Operating System linux # PART II

Experiment 5: Using the manual

$ man ls

$ man man

$ man -k file

$ man passwd

Experiment 6: Removing the display

$ clear

Experiment 7: looking for a description anticipates the command containing the keyword in the search

$ apropos date

$ apropos mail

$ apropos telnet

experiment 8: The search for the exact same command with a search key

$ whatis date

experiment 9: Manipulation of the file (files) and directories

> Display the current working directory

$ ls

> See all the complete file

$ ls-l

> Show all hidden files or directories

$ ls-a

> Show all files or directories without the process of sorting

$ ls-f

> Display the contents of the directory something

$ ls / usr

> Display the contents of the root directory

$ ls /

> Show all files or directories with mark mark (/) to a directory, an asterisk (*) for files that are executable, at sign (@) to file a symbolic link, sign (=) for the socket, a sign (%) for the white out and mark (|) to FIFO

$ ls-F / etc

experiment 10: Viewing the file type

$ file

$ file *

$ file / bin / ls

experiment 11: Copying a file

> Copy a file containing the-i option for interactive question if the file already exists

$ cp / etc / group f1

$ ls-l

$ cp -i f1 f2

$ cp -i f1 f2

> Copied to the directory

$ mkdir backup

$ cp f1 f3

$ ls backup

$ cd backup

$ ls

experiment 12: view the contents of the file

> Using the instructions of the paint

$ cat f1

> Display the file to full screen

$ f1 more

$ Pg f1

experiment 13: change the file name

> Using the instructions mv

$ mv f1 prog.txt

$ ls

> Move the file to another directory, if the last argument is the name of the directory so the files will be moved to that directory.

$ mkdir mydir

$ mv f1 f2 f3 mdir

experiment 14: delete the file

$ rm f1

$ cp f1 mydir/f1

$ cp mydir/f2 f2

$ rm f1

$ rm-i f2

experiment 15: looking katay or phrase in the file

$ grep root / etc / passwd

$ grep ": 0:" / etc / passwd

$ grep student / etc / passwd