Linux Common Command collation

File, Directory Class

File view, processing

Cat file # Displays the contents of the file

Cat-n File # Displays the number of line numbers

Cat file1 file2 > File3 # Merge the contents of the file File1 and file2 into the new file File3

Head File # Displays the first 10 lines of the file

Tail file # Displays the last 10 lines of the files

Tail-f File # Displays the latest additions to files and monitors file changes, often used to track log files

More file # based on the VI Editor text filter, which displays the contents of a text file on a full-screen basis

Less file # Functions much like more, PageUp page UP, PageDown page down, press Q to exit

Cat file1 > File2 # Overwrite Import

Cat file1 >> File # Append Import

wc-l [-m][-c][-w] File # count rows, characters, bytes, number of words

File query, search

grep KeyWord # using cat file with cat or other commands | grep KeyWord

Find Dir-name "*.log" # Search for files with the suffix. Log in the specified directory

Find Dir-name "*.log"-o-name "*.pid" # Search for ". Log" Files and ". pid" files in the specified directory

Find Dir-user User1 # Search for files belonging to User1 users in the specified directory

Text edit Vi/vim Bottom row mode

: Set Nu # Displays line numbers

: Set Nonu # does not display line numbers

: N # jumps to the specified nth row

: W File # Save As

: N1,n2 s/str1/str2/g # from N1 line to N2 line, replace str1 with STR2 (from beginning to end 1,$ s/str1/str2/g)

: Wq # Save and exit

: q! # Force quit does not save

Text Edit Vi/vim Command mode

G # to the last line (Shift + g)

GG # to First line

DD # Delete rows or cut rows

U # Undo

Y # When you select a piece with V mode, copy the selected block to the buffer with

YW # Copy a word (NYW or ynw, copy n word,n to numbers)

YY # Copy a row

Nyy # copy n rows down

P # Paste

Rights Management

chmod 755 Dir/file # Modify permissions for specified files and folders

Chmod-r 755 dir # recursively modifies permissions for directories and their sub-files, directories

Chown user File # To change the owner of files

Chown-r User dir # to change the owner of the directory

Chgrp group1 File # change the owner

Chgrp-r group1 dir # change the owning group of the directory

Chown user1:group1 File # Changes both the owner and the owning group

Chown-r user1:group1 dir # simultaneously changes the owner and owning group of the directory

WHOAMI # View Current action user

Who # View users who are currently logged on to the system

ID User1 # View user User1 's attribution ID information

Compression, decompression

TAR-CVF Test.tar Test.log # package only, do not compress

TAR-XVF Test.tar # Direct unpacking

TAR-ZCVF test.tar.gz Test.log # After packing, compress with gzip

TAR-ZCVF test.tar.gz * # Compresses all the files in the current directory

TAR-ZXVF test.tar.gz # Direct Decompression

TAR-ZXVF test.tar.gz-c dir # unzip to the new directory, only Dir and already exists

Zip Test.zip * # compresses all files in the current directory into zip packages

Unzip Test.zip # Unzip Zip package

User Management

Groupadd group1 # Create a user group

Groupdel group1 # Delete a user group

Groupmod-n group2 group1 # group1 Rename group2

Useradd User1 # Create user

Useradd-g group1 User1 # Create User1 and assign it to group1 group

Userdel-r User1 # Delete user1, "-r" parameter means also delete related directory in home directory

Usermod-g group2 User1 # change User1 group to Group2

Usermod-g group2 User1 # adds User1 to the Group2 group while preserving the original primary group

passwd # Modify the current user password

passwd User1 # Modify the password of the User1 user only for root user execution

Su User1 # switch to user user1

Groups User1 # View the group that the user User1 belongs to

View command Help

Help CD # for internal commands such as exit, History, CD, ECHO, etc. resident memory

LS--help # is primarily used for external commands, and you can view the storage path for external commands, such as LS,VI, via the Echo $PATH command

Man ls # command manual, available for all commands, enter "Q" to exit

Type cd # view command type, internal or external, and command location

System-related commands

Shutdown-h now # shut down immediately

Shutdown-r Now # Restart immediately

Uname-r # View Kernel version

Cal # Calendar

Date # time, date

Date-s "2015-12-22 08:00" # Modify Time

Ntpdate time.nist.gov # Synchronizing the current time

History # View Historical command record, runtime "!" + command number, such as!123 run the command number 123

PS-EF # Viewing processes

Kill PID # Terminate process

Kill-9 PID # forced termination process

Top # View current system Resource Usage

DF-H # Viewing disk information

FREE-M # Viewing memory information

Du-h File/dir # View a single file/directory Size-H representation to K,m,g

Du-sh File/dir # View File/directory Total size

Mount-o Loop Linux.iso/mnt/dir # Loading the file system to the specified mount point

Umount/mnt/dir # Uninstalling a file system that has already been loaded

RPM-IVH xxx.rpm # Install RPM Package

Rpm-e xxx.rpm # unload RPM Package

Yum Install XXX # installation package xxx

Yum Remove XXX # remove installed XXX

wget http://xxxx # Download the remote ZIP package

echo ' > XXX # empty XXX file contents

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Linux common commands collation