How to find a file in Linux by name?

The most direct way to find files in Linux is to use the find and locate commands. 1. Use find to search by file name, the syntax is find [Search path] -name "file name", which supports wildcards and additional conditions such as -type, -user, -size, etc.; 2. Use locate to quickly search, rely on the database, and need to perform updatedb updates regularly, which is suitable for quickly locate existing files; 3. Use other conditions of find to improve accuracy, such as filtering by modification time, user, size, etc. Mastering these two tools can effectively respond to most file search needs.

One of the most direct ways to find a file in Linux is to search by file name. If you know the general information about file names, use the command line tool to quickly locate the location of the file.

Use the find command to find files by name

find is a very powerful search tool in Linux, especially suitable for searching files by name, type, size and other conditions.

• The basic syntax is:

   find [Search path] -name "File name"

For example, if you want to find a file named example.txt in the entire system, you can run:

 find / -name "example.txt"

• Notes:
  • Searching the root directory / some permissions may be required. If the permissions are insufficient, many "Permission denied" prompts will be output. You can use sudo to increase permissions or narrow the search scope.
  • If you are not sure about the full file name, you can use the wildcard * . For example, find all .log files:

     find /var/log -name "*.log"

Quickly find files with locate

If you want to find files faster, you can use the locate command, which relies on a pre-built database and is therefore very fast.

• Basic usage:

  

   locate filename

• But it needs to be noted:

  • The database is not updated in real time and the latest created file may not be found. You can manually update the database:

     sudo updatedb

  • If the system does not have locate installed, it can be installed through a package manager in most distributions, such as Ubuntu:

     sudo apt install mlocate

Use find in combination with other conditions to improve accuracy

Sometimes multiple files with the same name may be distributed in different locations, and the results can be further filtered based on other conditions.

For example, find the file named todo.txt modified in the current user's home directory in the past 7 days:

 find ~/ -name "todo.txt" -mtime -7

Common combination options include:

• -type f means only normal files
• -user username to find files belonging to a user
• -size 10k finds files larger than 10KB

These additional criteria can help you lock your target faster from a bunch of search results.

Basically these are the methods. By mastering the two tools of find and locate , you can meet most of the needs of finding files by name.

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