Atualizei o Ubuntu para o 14.04 e o apache para de funcionar.
Eu reinstalei o apache e todas as dependências sem sucesso.
Quando entro no host local, vejo o apache indexando a pasta www /, mas ela está vazia (embora eu tenha vários arquivos e pastas). Quando eu digito em uma pasta que eu sei que existe, eu recebo um 404.
Esta é a saída error.log:
juan@juan-TE5:/var$ tail /var/log/apache2/error.log
[Mon Apr 21 14:46:48.899984 2014] [mpm_prefork:notice] [pid 21861] AH00163: Apache/2.4.7 (Ubuntu) configured -- resuming normal operations
[Mon Apr 21 14:46:48.900108 2014] [core:notice] [pid 21861] AH00094: Command line: '/usr/sbin/apache2'
[Mon Apr 21 14:46:50.326343 2014] [mpm_prefork:notice] [pid 21861] AH00169: caught SIGTERM, shutting down
[Mon Apr 21 14:46:51.650818 2014] [mpm_prefork:notice] [pid 21937] AH00163: Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4 configured -- resuming normal operations
[Mon Apr 21 14:46:51.650896 2014] [core:notice] [pid 21937] AH00094: Command line: '/usr/sbin/apache2'
Isso acontece quando eu digito no apache2
juan@juan-TE5:/var$ apache2
[Mon Apr 21 14:50:24.933493 2014] [core:warn] [pid 22112] AH00111: Config variable ${APACHE_LOCK_DIR} is not defined
[Mon Apr 21 14:50:24.933700 2014] [core:warn] [pid 22112] AH00111: Config variable ${APACHE_PID_FILE} is not defined
[Mon Apr 21 14:50:24.933734 2014] [core:warn] [pid 22112] AH00111: Config variable ${APACHE_RUN_USER} is not defined
[Mon Apr 21 14:50:24.933749 2014] [core:warn] [pid 22112] AH00111: Config variable ${APACHE_RUN_GROUP} is not defined
[Mon Apr 21 14:50:24.933788 2014] [core:warn] [pid 22112] AH00111: Config variable ${APACHE_LOG_DIR} is not defined
[Mon Apr 21 14:50:24.941240 2014] [core:warn] [pid 22112] AH00111: Config variable ${APACHE_LOG_DIR} is not defined
[Mon Apr 21 14:50:24.941401 2014] [core:warn] [pid 22112] AH00111: Config variable ${APACHE_LOG_DIR} is not defined
[Mon Apr 21 14:50:24.941419 2014] [core:warn] [pid 22112] 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}