Những câu lệnh Linux thường dùng pdf

commands to display file contents

cat pr more less

1. cat - conCATonate or display entire file contents

cat /etc/passwd

2. pr - format files with headings including the filename and page numbers

pr /etc/motd | lpr (formats the message-of-the-day file and

directs the output to the default printer)

3. more - display file contents one page at a time

cat /etc/passwd | more

is the same as:

more /etc/passwd

4. less - display file contents one page at a time

ls | less

keys used with the more and less commands:

up arrow key = up 1 line

down arrow key = down 1 line

spacebar = down 1 screen

b = back up 1 screen

q = quit

h = display help screen

commands to display file & directory attributes

ls pwd du find tree whereis

On a Linux file server used by several clients, there is a frequent need to find files,

modify files, share files and examine statistics about files. Linux has a number of very

useful commands for doing these kinds of tasks...

1. ls - list directory contents

ls (ls with no options: list files in current directory)

ls -a (list hidden files - files that begin with "." character)

ls -l (long/detailed listing)

ls -l /etc (list files in a specific directory)

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