Fail2ban cheat codes
Show all rules:
fail2ban-client status
Show banned IP's specific rule:
fail2ban-client status sshd
fail2ban-client set yourjailname unbanip youripaddress
Postgres select columns names without default value
PostgreSQL select column names where there is no default value : SELECT column_name, column_default FROM information_schema.columns WHERE (table_schema, table_name) = ('public', 'test') AND column_default IS NULL ORDER BY ordinal_position;
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