The Linux directive that will be used in the work at ordinary times (a) __linux

One, find instructions--Search Instructions most commonly used parameters: "-name"Find by name "-iname"Find by name and ignore case differences most commonly used commands: "Find directory name-name file or directory name"Find a file or directory under the specified directory based on the file name "Find directory name-iname file or directory name"Ditto, the-iname argument ignores case differences Two, grep instruction--Powerful text Search tool most commonly used parameters: "-I."Ignore keyword case differences "-R"Recursively lookup the keyword "-n" in the directory displays the number of line number "-C" Statistics keywords in the file that appear in the file most commonly used commands:The grep keyword file queries the string in the specified file the grep-i keyword fileDitto, and ignore case "grep-rn keyword directory"Ditto, and parameter display line number the GREP-C keyword fileNumber of times a statistic string appears in a file Third, PS directive--view process directives most commonly used commands: "PS aux"View the processes of all terminal users and display them in a user format (which can be combined with grep directives to find specific processes, such as "ps aux | grep php-fpm"） IV, Kill, pkill instructions-kill process, batch kill process instructions most commonly used commands: "kill-9 process number"Forced kill process "pkill-9 process name"Force kill process for all specified names v. Netstat instructions--View network information Instructions most commonly used parameters: " -a"All ports (only show permissions, you can switch to root to view all) "-T"TCP Port "-u" UDP port "-l" listening in port "-P" display PID and process name "-N" to display IP and port in digital form most commonly used commands:"Netstat-a" View all ports (show only permissions, can switch to root to view all) "Netstat-at" View all TCP ports,-t parameter specifies TCP "Netstat-au" View all UDP ports,-u parameter specifies UDP "NET" Stat-lt "View all TCP ports in listening, the-l parameter specifies" Netstat-ap "in listening to view all ports, the-p parameter shows the PID and process name (interfaces can be specified through piping and grep to find the port on which the process runs, such as" Netstat-ap | grep ssh ")" NETSTAT-ANP "To view all ports, the-n parameter displays the IP and port number in digital form (interfaces can be specified through pipes and grep to find processes running on ports, such as" NETSTAT-ANP | grep ': 8080 ' ") vi. chmod Instruction--directory permission Directive most commonly used parameters: "-R"Recursively modify all directories and files in the directory most commonly used commands: "chmod 777 directory name or filename"Permission to modify a file or directory is 777 "chmod-r 777 directory Name"Recursively modify directory permissions to 777 "chmod u=rwx,g=rw,o=r directory name or filename"Modify file Owner permissions for read/write execution, same group permissions for reads and writes, and other user rights vii. chown directive--Change file owner and user group most commonly used parameters: "-R"Recursively modify all directories and files in the directory most commonly used commands: "Chown Username: Group name file name"Modify the file owner and the owning group       "Chown-r user name: Group name Directory Name"Recursively modify the directory owner and the owning group Eight, tar--compression decompression Instructions most commonly used parameters:Mode (five select one, record only the two most commonly used): "-C"Compression "-X"To extract additional parameters: "-F"Specifies the compressed package name, which must be the last parameter "-V"Display process "-Z"Has the Gzip property "-C"Extract to specified directory most commonly used commands: "TAR-ZXVF Compressed package name-C specified directory"Unzip the specified compressed package to the specified directory    "TAR-ZCVF compressed package name multiple directories or files"Compresses the specified file and specifies the compressed package name ix. SCP Directives-transfer file directives across servers most commonly used parameters: "-R"Send Directory most commonly used commands: "SCP native file target machine username @ Target Machine IP: Target directory"Sends a native file to the specified directory of the specified machine (requires the target machine to open the SSH service) "SCP remote machine user name @ remote machine IP: File native directory"Copy the files on the remote machine to the local (requires the native SSH service to be turned on) "sudo launchctl load-w/system/library/launchdaemons/ssh.plist"Turn on native SSH service directives 10, user-related instructions-- most commonly used commands: "su user name"Toggle User "Su-user name"Switch users while switching environment variables "Useradd User name"Create a user "passwd User name"Modify user password, the default is that the current user, can use the root account to modify other user password "WhoAmI"View current logged-in user information 11, top command-performance monitoring instructions most commonly used commands: "Top"