Linux Common Command Collation (v): Shell Basics

Hello everyone, I'm a singing program, ape ~~~~~~.

Recently in the study of Linux, spare time on these basic commands to organize, I hope you can use, the purpose of the finishing is to forget when the turn out to see ^?_?^, before and after a total of five parts:

Linux Basic Command Collation (a): Common commands

Address: http://www.cnblogs.com/devinCat/p/7247824.html

Linux basic commands Collation (ii): Users, user groups, file systems, and networks

Address: http://www.cnblogs.com/devinCat/p/7247847.html

Linux basic commands Collation (iii): Process and Vim

Address: http://www.cnblogs.com/devinCat/p/7247883.html

Linux Common Command Collation (iv): package Management and Shell basics

Address: http://www.cnblogs.com/devinCat/p/7247911.html

Linux Common Command Collation (v): Shell Basics

Address: http://www.cnblogs.com/devinCat/p/7247926.html

Hope to be useful to everyone, welcome comments Exchange

Linux common commands (v)

--------------Shell Basics

Pipe command: "|", separating the two commands, the output of the pipeline negative left command will be input to the command on the right of the pipe character

such as: PS Aux|grep java

Find: Search for a file in a directory (and its subdirectories)

-path: Follow the path of the file to find

-print: Output a matching file in the console

-name: Search by file name

-perm: Follow the file's permissions to find

-user: Follow the file owner to find

-group: Find files according to the group to which the files belong

-mtime-n +n: According to file change time to find the file,-n means that the file change time is now less than n days, +n is the file more love time distance now n days ago

such as: Find-mtime-3 or +5

-nogroup: View the file of the invalid owning group, which does not exist in/etc/groups

-type: Finding a file of a certain type

B: Block device files

D: Catalogue

C: Character device file

P: Pipeline File

|: Symbol Connection File

F: Normal file

Find/etc-type L-print

-size N:[c] According to file length n file, with C for file length in bytes

Find. -size +1000c-print

SED: non-interactive text processing tool

H: Show Help

N: Show only results after script is processed

V: Display version information

E: Allow the input data to be edited using multiple SED commands

F: unmount the action of SED directly within a file,

S: String substitution

I: Insert

D: Delete

A: Append

C: Replace

P: Print the specified output line

grep: Full search, regular expression matching shows the book out

-N: Simultaneous display of rows of rows up and down the matching row

-B: Prints the block number where the line is printed before the match line

-C: Prints only the number of rows that match the row and does not display matching content

-F: Extracting templates from files

-H: The matching filename prefix is not displayed when searching multiple files

-I: Ignoring case differences

-Q: Suppress the display, returning only the exit status

-V: Anti-retrieval, showing only rows that do not match

Tail: The last few lines of a document file are displayed on the middle end, and if the file is updated, tail automatically refreshes to make sure you see the latest Ask price content

-F: This parameter is used to monitor file growth

-C Number: Reads a file from the number byte location

-N Number: reads the specified file from the number line location

-M Number: reads a file from the multiple-byte character location

-B Number: reads the specified file from the 512-byte block location of Number apprentice

-K Number: reads the specified file from the 1K location represented by number

such as: Tail? -N-filename

Displays the last 20 lines of the filename.

Sort: Sort by character by default

-N: Sort by value

-U: Duplicate rows do not appear

-T: Specify the symbol for the segment

-K: The number of paragraphs specified

-R: Reverse Sort

such as; Sort-t "."-K 4 Demo

Cut: Cut data in a file

-B: bytes

-C: Character

-F: Extract the first few columns

-D: Split columns by specified delimiter

such as: After the nineth byte cut-b 9-demo

such as: Before the nineth byte Cut-b-9 Demo

For example, get the first field cut-d with a dot delimiter. -F 1 Demo

History: Show All Histories

History 5: Show the last five commands executed

!! ? Run the previous command

!88? Run the 88th command

!88? /test? Run the 88th command and add/test after the command?

!? Cf?? Run the previous command containing a CF string???

!ls running the previous LS command

!ls:s/cf/l? Run the previous LS command, where the CF is replaced with l?

Fc? Edit and run the previous history command

Fc? 66? Edit and run a 66th history command

Fc? -e? /usr/bin/vim? 66? Use Vim to edit a 66th command and run

Linux Common Command Collation (v): Shell Basics