Linux practical tips: easily obtain the current user information
In the Linux operating system, it is often necessary to obtain the current user's information, such as user name, user ID, affiliation Group etc. This information is very important for system administration and debugging. This article will introduce several methods to obtain the current user's information and provide specific code examples.
whoami
command: The##whoamicommand can be used to obtain the username of the current user. This is a simple and commonly used method, suitable for quickly obtaining basic information about the current user.
$ whoami
command: The
idcommand can display the user ID, group ID and other details of the current user. information. Here is an example to get current user details:
$ id
Environment variable:
$USER in Linux environmentEnvironment variables store the username of the current user. You can print out the current user name through the
echocommand:
$ echo $USER
command:
w Thecommand can display the user information currently logged into the system, including user name, terminal, login time, etc. The following is an example of viewing the current user information:
$ w
command: The
lognamecommand is used to get the current The login name of the logged in user, similar to
whoami. The following is an example of obtaining the current logged-in username:
$ logname
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