Linux 7th Day

Linux 7th Day

Time: 20180723

Bash features

Curly braces unfold

{001..20..2}

Command completion

Tag option completion (CENT7 support Bash-complement)

Command line History

Histroy ~/bash_history

!! Repeat the previous command

!-1 repeat the previous command

Ctrl+p Print the previous command on the current command line

!? String executes the last command containing string

!$:p Output The last parameter of the last command line

!*:p Output All parameters of the last command

^string deletes a string from the previous command and executes

Ctrl+r Search History Command ctrl+g exit Search History command

Esc. Print the last parameter of the previous command

History

-C Clears all command history in memory

-A synchronizes the history of the command in memory to the file

-D Delete Specifies a command history

-R synchronizes commands in the history file into memory (reads repeatedly)

-N synchronizes commands in the history file into memory (no repeated reads)

-P executes a command without buffering it into the command history

-S does not execute a command, just caches it in the command history cache

Bash's shortcut keys

CTRL + Z Hang command

CTRL + C terminate command

Ctrl+s Block Screen

Ctrl+q Allow screen output

Echo '---' >/sys/class/scsi_host/host2/scan triggers the VMware Discovery Drive and is only used in VMware

Linux File System architecture

FSH Filesystem Hierarchy Standard

Creating special Files

-hosts create such a file

Touch/data/-hosts

Linux 7th Day