kworr questions

kworr answers

• Getting UTC UNIX timestamp in Lua
• PostgreSQL: Conditional unique constraint
• How to know if a given user has read and/or write permissions for a given path
• Postgres Unique Constraint on two columns: Integer and Boolean
• I can't start MySQL on linux - Error mysqld_safe
• Nginx: Return 301 Redirect When 404 Error
• UnicodeEncodeError only when running as a cron job [duplicate]
• Increasing 504 timeout error