https://www.postgresql.org/docs/current/app-psql.html
\du \du+ \dg \ddp \dp \dp *.* \list \dn Lists schemas (namespaces) \dt \c \l
\dE[S+] [ pattern ] \di[S+] [ pattern ] \dm[S+] [ pattern ] \ds[S+] [ pattern ] \dt[S+] [ pattern ] \dv[S+] [ pattern ]
psql
.psqlrc, .pgpass
$HOME/.pg service.conf
-U, -W, -d
\du, \dg, \ddp, \dp, \list, \dn, \dt, \c, \l, \di, \q
show users
show
su - postgres
psql -c, \?, \connect
--version, --help
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