Examples

lineinfile

## DOCUMENTATION online help: offline help: ## EXAMPLE 1 ## PLAYBOOK --- - name: lineinfile module example 1 hosts: all become: True gather_facts: no tasks: # - name: Debug (1), check file before add shell: cat /home/ansible/hello.txt register: results1_before - debug: var=results1_before.stdout_lines - name: (1) Add a line to a file if the file does not exist, without passing regexp lineinfile: path: /home/ansible/hello.txt line: "Welcome to our website!" create: yes - name: Debug (1), check file after add shell: cat /home/ansible/hello.txt register: results1_after - debug: var=results1_after.stdout_lines # - name: Debug (2), check file before update shell: cat /home/ansible/hello.txt register: results2_before - debug: var=results2_before.stdout_lines - name: (2) update a line with specific string pattern (using regexp) lineinfile: path: /home/ansible/hello.txt regexp: '^Hello$' line: Hello, world - name: Debug (2), check file after update shell: cat /home/ansible/hello.txt register: results2_after - debug: var=results2_after.stdout_lines # - name: Debug (3), check file before remove shell: cat /home/ansible/hello.txt register: results3_before - debug: var=results3_before.stdout_lines - name: (3) remove a line with specific string pattern (using regexp) lineinfile: path: /home/ansible/hello.txt regexp: '^Welcome to our.*$' state: absent - name: Debug (3), check file after remove shell: cat /home/ansible/hello.txt register: results3_after - debug: var=results3_after.stdout_lines # - name: Debug (4), check file before insert before & after shell: cat /home/ansible/hostnames.txt register: results4_before - debug: var=results4_before.stdout_lines - name: (4a) Insert line before lineinfile: path: /home/ansible/hostnames.txt insertbefore: '^server5' line: server4 - name: (4b) Insert line after lineinfile: path: /home/ansible/hostnames.txt insertafter: '^server1' line: server2 - name: Debug (4), check file after remove shell: cat /home/ansible/hostnames.txt register: results4_after - debug: var=results4_after.stdout_lines ## OUTPUT PLAY [lineinfile module example 1] ***************************************************************** TASK [Debug (1), check file before add] ************************************************************ changed: [ubuntu20_int] changed: [debian11_int] TASK [debug] *************************************************************************************** ok: [debian11_int] => { "results1_before.stdout_lines": [ "Hello" ] } ok: [ubuntu20_int] => { "results1_before.stdout_lines": [ "Hello" ] } TASK [(1) Add a line to a file if the file does not exist, without passing regexp] ***************** changed: [ubuntu20_int] changed: [debian11_int] TASK [Debug (1), check file after add] ************************************************************* changed: [ubuntu20_int] changed: [debian11_int] TASK [debug] *************************************************************************************** ok: [debian11_int] => { "results1_after.stdout_lines": [ "Hello", "Welcome to our website!" ] } ok: [ubuntu20_int] => { "results1_after.stdout_lines": [ "Hello", "Welcome to our website!" ] } TASK [Debug (2), check file before update] ********************************************************* changed: [ubuntu20_int] changed: [debian11_int] TASK [debug] *************************************************************************************** ok: [debian11_int] => { "results2_before.stdout_lines": [ "Hello", "Welcome to our website!" ] } ok: [ubuntu20_int] => { "results2_before.stdout_lines": [ "Hello", "Welcome to our website!" ] } TASK [(2) update a line with specific string pattern (using regexp)] ******************************* changed: [ubuntu20_int] changed: [debian11_int] TASK [Debug (2), check file after update] ********************************************************** changed: [ubuntu20_int] changed: [debian11_int] TASK [debug] *************************************************************************************** ok: [debian11_int] => { "results2_after.stdout_lines": [ "Hello, world", "Welcome to our website!" ] } ok: [ubuntu20_int] => { "results2_after.stdout_lines": [ "Hello, world", "Welcome to our website!" ] } TASK [Debug (3), check file before remove] ********************************************************* changed: [ubuntu20_int] changed: [debian11_int] TASK [debug] *************************************************************************************** ok: [debian11_int] => { "results3_before.stdout_lines": [ "Hello, world", "Welcome to our website!" ] } ok: [ubuntu20_int] => { "results3_before.stdout_lines": [ "Hello, world", "Welcome to our website!" ] } TASK [(3) remove a line with specific string pattern (using regexp)] ******************************* changed: [ubuntu20_int] changed: [debian11_int] TASK [Debug (3), check file after remove] ********************************************************** changed: [ubuntu20_int] changed: [debian11_int] TASK [debug] *************************************************************************************** ok: [debian11_int] => { "results3_after.stdout_lines": [ "Hello, world" ] } ok: [ubuntu20_int] => { "results3_after.stdout_lines": [ "Hello, world" ] } TASK [Debug (4), check file before insert before & after] ****************************************** changed: [ubuntu20_int] changed: [debian11_int] TASK [debug] *************************************************************************************** ok: [debian11_int] => { "results4_before.stdout_lines": [ "server1", "server3", "server5" ] } ok: [ubuntu20_int] => { "results4_before.stdout_lines": [ "server1", "server3", "server5" ] } TASK [(4a) Insert line before] ********************************************************************* changed: [ubuntu20_int] changed: [debian11_int] TASK [(4b) Insert line after] ********************************************************************** changed: [ubuntu20_int] changed: [debian11_int] TASK [Debug (4), check file after remove] ********************************************************** changed: [ubuntu20_int] changed: [debian11_int] TASK [debug] *************************************************************************************** ok: [debian11_int] => { "results4_after.stdout_lines": [ "server1", "server2", "server3", "server4", "server5" ] } ok: [ubuntu20_int] => { "results4_after.stdout_lines": [ "server1", "server2", "server3", "server4", "server5" ] } PLAY RECAP ***************************************************************************************** debian11_int : ok=21 changed=13 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0 ubuntu20_int : ok=21 changed=13 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0