January 21, 2024

Grep multiple patterns (words) occuring at the beginning of a line

$ grep -E -w '^(pattern1|pattern2|etcetera)' file.s

For example:

$ postconf -d | grep -E -w '^(syslog_name|smtpd_tls_security_level|smtpd_tls_wrappermode|smtpd_sasl_auth_enable|smtpd_relay_restrictions|smtpd_recipient_restrictions|smtpd_sasl_typesmtpd_sasl_path)'

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