Introduction to command history and shortcut keys

Command History Introduction

historyView historical tools;historyThe command displays more than the user's home directory.bash_historyThere is a command in this file to note that the newly built user will not have to log out to have this file, the file is stored in the command is the previous user logged on the command, and the user logged on after the system automatically loaded the command in this file into memory,historyIt also shows that the command that the user logged in will be cached in memory, and when the user exits normally, the command will be loaded into.bash_history650) this.width=650; "src=" http://7xread.com1.z0.glb.clouddn.com/91129b63-20cc-4585-b330-d87814d34190 "alt=" description of the picture "Style=" border:0px;vertical-align:middle; "/>

The user executed the command to hold the file 650) this.width=650; "Src=" http://7xread.com1.z0.glb.clouddn.com/ D98b3835-09b0-4daf-bba7-8933509cd6ef "alt=" Picture description "style=" border:0px;vertical-align:middle; "/>

Repeat the last command

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！ : 1 invokes the two segment of the last command and executes

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CTRL + N Displays the next command of the current command Ctrl+j executes the current command! n Execute the history n command! -N means to perform the reciprocal n 650) this.width=650; "Src=" http://7xread.com1.z0.glb.clouddn.com/58262bf3-f944-450b-bf60-3655eccf8591 "alt=" Picture description "style=" border:0px;vertical-align:middle; "/>

Command line history 650) this.width=650; "src=" http://7xread.com1.z0.glb.clouddn.com/c81befd2-c3e8-4175-9dc8-0f6f953a695b "alt=" Picture description "style=" border:0px;vertical-align:middle; "/>

！ IC call the last command to start with an IC

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！？ The previous command in the SYS call that contains a string;

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Only print with! Xx:p followed by a string beginning with a previous command, not executing 650) this.width=650; "Src=" http://7xread.com1.z0.glb.clouddn.com/ 8fee7ddd-f0b1-4d37-bfa1-2dd98294b24c "alt=" Picture description "style=" border:0px;vertical-align:middle; "/>

Print only the last parameter of the previous command! Se:p 650) this.width=650; "src=" Http://7xread.com1.z0.glb.clouddn.com/1cfd01d7-5cd6-4d29-a904-79056a9c11af "alt=" Picture description "style=" border:0px;vertical-align:middle; "/>

！ * Call the previous command all parameters 650) this.width=650; "Src=" http://7xread.com1.z0.glb.clouddn.com/ ca49163e-07b4-46b5-818c-c7d19b822d58 "alt=" Picture description "style=" border:0px;vertical-align:middle; "/>

^xx means delete the first parameter xx character at the beginning of the previous command

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FFGG means replacing the first FF in the previous command with GG

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Search all the FF characters in the previous command and replace the HH characters! : GS/FF/HH 650) this.width=650; "Src=" http://7xread.com1.z0.glb.clouddn.com/d9d435cc-967b-4928-8707-3b28c157e027 " alt= "Picture description" style= "border:0px;vertical-align:middle;"/>

Description of shortcut keys

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Call a parameter of the last command to do this command parameter 650) this.width=650; "Src=" http://7xread.com1.z0.glb.clouddn.com/ 61a4fce4-580d-450e-8430-42ae98f47d34 "alt=" Picture description "style=" border:0px;vertical-align:middle; "/>

History Introduction

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In/etc/profile define the History command bar number 650) this.width=650; "Src=" http://7xread.com1.z0.glb.clouddn.com/ 77d5f591-da03-412b-bb8c-f488f8fe6b6a "alt=" Picture description "style=" border:0px;vertical-align:middle; "/>

history -cClear History

history -d XDelete the x command specified in history

history -rRead all in-memory history command line append to file

history  -nThe history command line in the read memory is appended to the file, but the duplicate rows are ignored

history  -wSpecify a directory to save

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history -pPrint parameters do not remember history 650) this.width=650; "Src=" Http://7xread.com1.z0.glb.clouddn.com/2fc9e13f-6fc7-43fe-8ddb-19aeba15eee1 " alt= "Picture description" style= "border:0px;vertical-align:middle;"/>

-S fake history history -s ‘rf -rf /*‘ list shows RM-RF/*

Set temporary add time 650) this.width=650; "src=" http://7xread.com1.z0.glb.clouddn.com/a776f753-0508-43b3-ac63-018195007f01 "alt = "Picture description" style= "border:0px;vertical-align:middle;"/> Variable

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Histignore variable setting ignores a field

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Set the variable file in the user home directory. Bash_profile 650) this.width=650; "Src=" http://7xread.com1.z0.glb.clouddn.com/ 3e1c0170-bbaf-4589-ad74-96269c5b541f "alt=" image description "style=" border:0px;vertical-align:middle; "/> Command history-related variables 650) this.width=650; "src=" http://7xread.com1.z0.glb.clouddn.com/bfd9cd29-aa7c-4d3c-92ce-3a512203fd6d "alt=" Picture description " Style= "Border:0px;vertical-align:middle;"/>

Introduction to shortcut keys

CTRL + L equivalent to clear screen, clear

o executes the current command and displays the current command

s block screen output and lock

Q Allow screen output

C forcibly terminate the command

Z Suspend command

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CTRL + A cursor moves to the beginning of the line

e cursor moves to end of line

f the cursor moves one character to the right

b Move one character to the left

XX move toggle at the beginning of the cursor and at the cursor

U delete from cursor at beginning of line

K Remove from cursor to end of line ALT + F cursor moves right one word ending

b The cursor moves to the left one word word head

R Delete entire line 650) this.width=650; "src=" Http://7xread.com1.z0.glb.clouddn.com/6a0776ca-4977-45a4-8354-6198347efa44 "alt=" Picture description "style=" Border:0px;vertical-align:middle; "/>de 650) this.width=650;" src= "http:// 7XREAD.COM1.Z0.GLB.CLOUDDN.COM/2C6C028B-343B-43E2-8E6C-6C46D8C1CD1A "alt=" image description "style=" Border:0px;vertical-align : Middle; "/>

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Introduction to command history and shortcut keys