[Linux](EN) Find file or directory using find command

Use find command in specific directory(path) to find file or directory


Environment and Prerequisite

  • Linux base system
  • Bash shell(/bin/bash)


What is find?

find

  • find : search for files in a directory hierarchy
  • Below are examples of find command usages
# Basic Usage
$ find [-H] [-L] [-P] [-D debugopts] [-Olevel] [starting-point...] [expression]

# Example1
$ find .
.
./test2.txt
./test_in
./test_in/another_test.txt
./pid_test_shell.sh
./test.txt
./tools

# Example2
$ find ./ -name "*.txt"
./test2.txt
./test_in/another_test.txt
./test.txt

# Example3
# -L option follow symbolic link
$ find -L ./ -name "*.sh"
./pid_test_shell.sh
./tools/upgrade_packages.sh
./tools/run_jupyter_notebook.sh
./tools/install_packages.sh


Examples

Find file using with grep

  • Use pipe and grep command
  • find path | grep file_name
$ find . | grep test.txt
./anaconda3/pkgs/pylint-1.7.4-py36hb9d4533_0/lib/python3.6/site-packages/pylint/test/functional/using_constant_test.txt
./anaconda3/lib/python3.6/site-packages/pylint/test/functional/using_constant_test.txt
./test/test_in/another_test.txt
./test/test.txt
./.pyenv/versions/3.5.3/lib/python3.5/test/test_doctest.txt
./.pyenv/versions/3.5.2/lib/python3.5/test/test_doctest.txt
./.pyenv/versions/3.6.1/lib/python3.6/test/test_doctest.txt


Find file using file name

  • Use command with -name
  • find path -name file_name
$find . -name test.txt
./test/test.txt


  • Use command with -L
$ ls -l
total 16
-rwxrwxr-x 1 twpower twpower  119 May  6 18:36 pid_test_shell.sh
-rw-rw-r-- 1 twpower twpower    8 May  6 18:30 test2.txt
drwxrwxr-x 2 twpower twpower 4096 May 26 23:31 test_in
-rw-rw-r-- 1 twpower twpower   84 May  6 18:31 test.txt
lrwxrwxrwx 1 twpower twpower   20 May 26 14:53 tools -> /home/twpower/tools/

$ find ./ -name "*.sh"
./pid_test_shell.sh

$ find -L ./ -name "*.sh"
./pid_test_shell.sh
./tools/upgrade_packages.sh
./tools/run_jupyter_notebook.sh
./tools/install_packages.sh


Search file contents using with xargs

  • Use find, pipe, xargs and grep command.
  • find . -name "*.txt" | xargs grep "He"
$ find . -name "*.txt" | xargs grep "He"
./test2.txt:Hello
./test2.txt:Hellot
./test2.txt:tHello


Reference

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