forums /etc/init.d # /etc/init.d/mysql start
 * Checking mysqld configuration for mysql ...
2021-10-02 22:07:32 0 [Warning] Could not increase number of max_open_files to more than 4096 (request: 32206)
2021-10-02 22:07:32 0 [Warning] Changed limits: max_open_files: 4096  max_connections: 151 (was 151)  table_cache: 1957 (was 2000)
2021-10-02 22:07:32 0 [Warning] No argument was provided to --log-bin and neither --log-basename or --log-bin-index where used;  This may cause repliction to break when this server acts as a master and has its hostname changed! Please use '--log-basename=forums' or '--log-bin=mariadb-bin' to avoid this problem.
2021-10-02 22:07:32 0 [ERROR] mysqld: File './mariadb-bin.index' not found (Errcode: 13 "Permission denied")
 * mysql config check failed                                                                                     [ !! ]
 * ERROR: mysql failed to start
forums /etc/init.d # emerge --config mariadb
Configuring pkg... * ERROR: dev-db/mariadb-10.5.9::core-server-kit failed (config phase):
 *   mysql user cannot write into PID dir '/run/mysqld'!
 * 
 * Call stack:
 *     ebuild.sh, line  93:  Called pkg_config
 *   environment, line 4402:  Called die
 * The specific snippet of code:
 *           die "${MYSQL_USER} user cannot write into PID dir '${PID_DIR}'!";
 * 
 * If you need support, post the output of `emerge --info '=dev-db/mariadb-10.5.9::core-server-kit'`,
 * the complete build log and the output of `emerge -pqv '=dev-db/mariadb-10.5.9::core-server-kit'`.
!!! When you file a bug report, please include the following information:
GENTOO_VM=  CLASSPATH="" JAVA_HOME=""
JAVACFLAGS="" COMPILER=""
and of course, the output of emerge --info =mariadb-10.5.9
 * The complete build log is located at '/var/tmp/portage/dev-db/mariadb-10.5.9/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-db/mariadb-10.5.9/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-db/mariadb-10.5.9/homedir'
 * S: '/var/tmp/portage/dev-db/mariadb-10.5.9/work/mariadb-10.5.9'