Learning notes-batch create and set passwords and delete users in Linux

Learning notes-basic knowledge of creating users and setting passwords and deleting users in Linux in batches: root: x: 0: 0: root:/bin/bash User: Password: User ID: group ID: Full name: bashUser: Password: Uid: Gid: FullName: bash. Next, we will use two methods to batch... learning notes-basic knowledge of creating users and setting passwords and deleting users in Linux in batches: root: x: 0: 0: root:/bin/bash User: Password: User ID: group ID: Full Name: bash User: Password: Uid: Gid: Full Name: bash. Next, you can process users in batches in two ways, brief introduction to redirection and script redirection> stdout (standard output) standard output-1 in algebra, writing commands to documents or devices-can be understood as overwriting <stdin (standard input) standard input-the algebra is 0. data is read from a file.> Append data to the end of the file without deleting its own data> & write data from one handle to another <& likewise, read another handle to the left | pipeline operation, the command to process redirection method after throwing the data on the left to the pipeline: Create a user using vimfor batch creation, for example, testusers.txt (with a random name), and write it according to the specifications in/etc/passwd .. User01: 500: 500: USER01:/home/user01:/bin/bash user02: 500: 500: USER02:/home/user02:/bin/bash user03 :: 500: 500: USER03:/home/user03:/bin/bash user04: 500: 500: USER04:/home/user04: run/bin/bash on the terminal (management identity) root @ crper :~ # Newusers <testUser.txt because I am processing the directory of this file, you can directly do this if it is another directory .. You can use the absolute path eg: newusers