Linux 命令(249)—— unset 命令(builtin) 编程算法shell 文章目录 1.命令简介 2.命令格式 3.选项说明 4.返回值 5.常用示例 参考文献 1.命令简介 unset 删除指定的 Shell 变量或函数。 注意,unset 不能删除具有只读属性的 Shell 变量和环境变量。 2.命令格式 unset [-fv] [name ...] 当不指定选项时,...
userdel user_name//删除用户(不会删除个人文件夹) userdel -r user_name//用户和文件一同删除 passwd 命令 passwd -l user_name//锁定用户(违规用户)或者 在/etc/shadow文件中属于该用户的行的第二个字段(密码)前面加上*就可以了。想恢复该用户,去掉*即可。 passwd -u user_name//解锁用户 passwd -d use...
Instead of a full description, if you only want to know what thecdcommand does, you can use the-doption. #help -d cd Thehelpcommand, when used with the-doption, provides a one-liner brief description of the specified command. To view how to use thecdcommand or the command syntax of...
The type command in Linux displays information regarding Linux commands. It tells you the type of a Linux command. Type of command is indicative of how the
Only a count of selected lines is written to standard output. --colour=[when], --color=[when] Mark up the matching text with the expression storedinthe GREP_COLOR environment variable. The possible values of when are “never”, “always” and “auto”. ...
As this involves security concerns, the administrator should work in conjunction with their security team to understand the best solution available to their company. To record all commands entered into the shell in a linux environment to a log file. This can be useful for auditing user actions ...
The userdel command is a Linux utility that can be used to delete user accounts and their associated files.Open the terminal and type userdel username. It performs this function by removing the user’s entry from the /etc/passwd file, and other files associated with the account....
-u: Specifies the user credentials for server authentication. -d: Sends the specified data in a POST request to the server. -x: Specifies the proxy address to use for the requests. 30 Examples of cURL Command in Linux Now, let’s delve into some practical examples of using the cURL com...
After executing these commands, the timestamp display in the command history will revert to the default setting, and duplicate commands will no longer be filtered out automatically. 7. List Specific User’s Executed Commands To list specific user’s executed commands, you can use the.bash_history...
The help command is the simplest way to get information regarding a built-in shell command. It helps you fetch information from the shell's internal