после обновления Ubuntu (apt-get upgrade) апачь перестал корректно работать - виртуальные хосты не работают.
симптомы:
jj@jjpc ~ $ apache2 --version
[Sun Mar 12 23:42:12.653797 2017] [core:warn] [pid 3277] AH00111: Config variable ${APACHE_LOCK_DIR} is not defined
[Sun Mar 12 23:42:12.653854 2017] [core:warn] [pid 3277] AH00111: Config variable ${APACHE_PID_FILE} is not defined
[Sun Mar 12 23:42:12.653867 2017] [core:warn] [pid 3277] AH00111: Config variable ${APACHE_RUN_USER} is not defined
[Sun Mar 12 23:42:12.653943 2017] [core:warn] [pid 3277] AH00111: Config variable ${APACHE_RUN_GROUP} is not defined
[Sun Mar 12 23:42:12.653957 2017] [core:warn] [pid 3277] AH00111: Config variable ${APACHE_LOG_DIR} is not defined
[Sun Mar 12 23:42:12.656411 2017] [core:warn] [pid 3277:tid 139859706599296] AH00111: Config variable ${APACHE_LOG_DIR} is not defined
[Sun Mar 12 23:42:12.656589 2017] [core:warn] [pid 3277:tid 139859706599296] AH00111: Config variable ${APACHE_LOG_DIR} is not defined
[Sun Mar 12 23:42:12.656601 2017] [core:warn] [pid 3277:tid 139859706599296] AH00111: Config variable ${APACHE_LOG_DIR} is not defined
AH00526: Syntax error on line 74 of /etc/apache2/apache2.conf:
Invalid Mutex directory in argument file:${APACHE_LOCK_DIR}
питался решить при помощи гугла, ничего не помогло
в итоге снес убунту накатил минт (обновив) и поставив апачь.
и все та же ошибка
как победить?