Linux provides us with tools that make it easy for us to find the location of files and commands quickly and efficiently.

Find Commands

whereis

We can use the whereis command to get the location of a command’s binary, source, and user manual.

Here are some options provided by the whereis command:

By default, all three options are used:

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whereis ls    # This is equivalent to whereis -sbm ls

locate

We can also use the locate command to find the location of a command.

Here are some options provided by the locate command:

By default, the option -w is used:

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locate '/bin/ls'    # This is equivalent to locate -w '/bin/ls'

Find Files

With the find command, we can find almost all the files we want.

Let’s prepare some directories:

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touch file01 file02 file03
mkdir -p dir01/dir01_01/dir01_01_01
mkdir -p dir01/dir01_02/dir01_02_01
mkdir -p dir01/dir01_03/dir01_03_01
mkdir -p dir02/dir02_01/dir02_01_01
mkdir -p dir02/dir02_02/dir02_02_01
mkdir -p dir02/dir02_03/dir02_03_01
ll
tree dir01 dir02

Here are some options provided by the find command:

Find By Name

Iterate over all files or directories in a subdirectory whose names start with dir:

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find -name 'dir*'

Let’s look for files or directories that begin with dir01:

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find -name 'dir01*'

Find By Path

If we want to find the directory we want more effectively, we can use the path option.

Let’s look for directories that are structured like this: 01_02/dir

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find -path '*01_02/dir*'

Search for Directories

We can find directory type files with the -type l parameter:

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find -type d

Search for Regular Files

We can find regular file type files with the -type l parameter:

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find -type f

Search for Symbolic(Soft) Links

We can find regular file type files with the -type l parameter:

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ln -s file01 file01_link    # This will create a symbolic link called file01_link
ll file01_link
find -type l

References WHEREIS(1), LOCATE(1), Findutils, 2 Finding Files, 4 File Name Databases,

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