Linux basic commands

CD CD. Previous level CD-Previous CD ~ root directory

LS -a lists all files (including hidden files)-L lists details-s list file size-T sorted by time-a lists except. and. File-r file directory for all subdirectories listed in the-S file size sort

Netstat -a lists all listening ports-n rejects display aliases-p displays the program name and process number that establish the associated link-t only and TCP-only and UDP-related-l lists only the service status that is in Listen (listening)

-C executes the netstat command every other fixed time. -C executes the netstat command every other fixed time.

NETSTAT-ANP | grep LISTEN Displays all listening ports and process numbers

cat View text: Cat filename View entire file contents cat > FileName Create a new file, cannot edit an existing file cat file1 file2 > file merges two files into one file

vim enters text edit press ESC: Wq save and exit: Q exit: q! ignore changes and exit Shift + G: Move down SHIFT + E: Move up I: Enter edit mode

MV [move the file name or directory name] [mobile destination directory] Move

CP [file name or directory] [Mobile Destination Directory] Replication

Apt-get Apt-get Search package View related packages Apt-get Install package packages

Current directory where pwd is located

Grep

Example tar:

Extract

• TAR–XVF File.tar Unpacking the TAR Package
• TAR-XZVF file.tar.gz Decompression tar.gz
• TAR-XJVF file.tar.bz2 Decompression tar.bz2
• TAR–XZVF File.tar.z Unzip the tar. Z
• Unrar e file.rar decompression rar
• Unzip File.zip Unzip zip

Compression

• TAR–CVF Jpg.tar *.jpg package All JPG files in the directory into tar.jpg
• TAR–CZF jpg.tar.gz *.jpg package All JPG files in the directory into Jpg.tar and compress them in gzip to generate a gzip compressed package named jpg.tar.gz
• TAR–CJF jpg.tar.bz2 *.jpg package All JPG files in the directory into Jpg.tar, and then compress them in bzip2 to generate a bzip2 compressed package named jpg.tar.bz2
• TAR–CZF jpg.tar.z *.jpg package All JPG files in the directory into Jpg.tar, and then compress them in compress to generate a umcompress compressed package named Jpg.tar.z
• RAR a jpg.rar *.jpg rar format compression, you need to download RAR for Linux first
• Zip jpg.zip *.jpg zip format compression, you need to download the zip for Linux first

mkdir Creating a folder

RM Delete a file or folder

alias set don't kill alias = "Relative Command" Example: alias= "Ls-g", Ubuntu set permanent alias

Vim ~/.BASHRC Add to the file in the appropriate location

Ubuntu config environment variable : in/etc/environment file

Path= "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/share/ Zookeeper/bin/"

When adding the corresponding variable, in quotation marks Nega: Related directory

Configuring IP addresses and DNS

Open the/etc/network/interfaces file and modify the appropriate information. The static IP configuration is as follows

# The Primary network interface

Auto Enp3s0

Iface Enp3s0 inet Static

Address 192.168.172.109

Netmask 255.255.255.0

Gateway 192.168.172.1

Dns-nameservers 202.96.134.133

The DHCP configuration is as follows

# The Primary network interface

Auto Enp3s0

Iface ENP3S0 inet DHCP

Linux basic commands