Solve the problem that the command cannot be found under Linux

Error reason:

When executing the command, the system will search for it from the system environment variables. If it is found, it will be executed. If it is not found, it will report that the command has not been completed. turn up.

The following uses the command not found error message when executing mysql mysqladmin under Linux as an example to explain the solution.

(Online video tutorial sharing: linux video tutorial)

The solution is as follows:

1. Check the current environment variables of the system

After the mysql program is installed, when you directly execute mysql or mysqladmin, the system will first look for the command in /usr/bin. If it is not in this directory, of course it will not be found. At this time, we need to create a link file for these unfound commands and link to /usr/bin.

2. Check whether this command exists in the environment variable. The operation is as follows:

If the command exists in the environment variable, the specific existence will be output. Path, as shown below:

If it does not exist, it will prompt that the command is not found, as shown below:

Make a link Before, we must know the full path of this command, such as mysqladmin

3. Find the full path of this command

[root@admin bin]# find / -name mysqladmin

The results can be seen , there are two places where mysqladmin exists. We don’t need to worry about the first one, that is his original path.

4. The next thing you need to do is to directly link the following path to /usr/bin. The operation is as follows:

[root@admin bin]# ln -s /usr/local/mysql/bin/mysqladmin /usr/bin

After the link is successful, execute this command again and it will be ok.

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