Shell Command Summary

"Bash shell built-in Commands"

Type-a:

File: Represents an external command

Alias: The name set by the command alias

Buildin: Internal command

Note: The execution of a command can be performed using both absolute and relative paths (./).

"Directories and Files"

mkdir: Create directory mkdir ~/sbin

Touch: Create a file Touch test.c

File: View files Type

ln: for file links

LN-SF: Symbolic link. link files and source files use different inode numbers

Ln-f: Hard links. Link file and source file use the same inode number

Note:

Summary of the various directories under Linux:

~/: The current user's home directory

./: Current directory

.. /: Previous level Directory

The file name is added "." to indicate that it is a hidden file

"File content View"

Cat: Start from the first line

TAC: Start viewing from the last line

NL: When viewed, shows travel number NL test.c

MORE: Page by page, cannot forward View more test.c spacebar to page back

Less: Similar to more, but can view the less test.c spacebar to page back

Head: View the first few lines head-n test.c

Tail: View the following lines Tail-n test.c

"System-related"

DF: View Hard disk usage

Free: Memory usage

Uname: Viewing the kernel

Uptime: Start time, workload

Netstat: Network view

DMESG: Analysis kernel, and other hardware

Vmstat: Detecting the status of CPU, memory, hard disk

Ps-l: View processes under the current user

PS aux: View all Processes

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Shell Command Summary