Regex

wikipedia:regex (1951)

• or |

Ansible

  - lineinfile:
       path: /etc/default/sysstat
       state: present
       backrefs: yes
       regexp: '^ENABLED="false"'
       line: 'ENABLED="true"'

See also

• Programming: C, go, loop, While, for, if, variable assignment, Error handling, Regex, Function