When trying to configure Virtual Hosts on Ubuntu 14.04.1, Apache2 did not start and got the error like following.
# service apache2 start
* Starting web server apache2
* (98)Address already in use: AH00072: make_sock: could not bind to address [::]:80
* The apache2 instance did not start within 20 seconds. Please read the log files to discover problems
Most blogs advise "Find the process which is using TCP Port 80.", but such process it not running. Mmm....
root@ubuntu:/home/kotaro# netstat -ap
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 localhost:mysql *:* LISTEN 1159/mysqld
tcp 0 0 *:ssh *:* LISTEN 1057/sshd
tcp 0 0 172.16.45.169:ssh 172.16.45.1:49474 ESTABLISHED 1808/sshd: kotaro [
tcp6 0 0 [::]:ssh [::]:* LISTEN 1057/sshd
udp 0 0 *:bootpc *:* 901/dhclient
udp 0 0 *:11004 *:* 901/dhclient
udp6 0 0 [::]:9859 [::]:* 901/dhclient
I got the problem in "/etc/apache2/sites-enabled/000-default.conf".
The line of "Listen 80" was not necessary. It looks Apache2 tried to use TCP Port 80 twice (default behavior and another one caused by my configuration), and naturally failed in the second attempt. I can understand I could not find any process using TCP Port 80 after apache2 gives up to start....
I was so careless because I simply followed the note in Apache 2.4 documentation without thinking anything. It was an easy mistake which I stuck in for 1 hour.....
# service apache2 start
* Starting web server apache2
* (98)Address already in use: AH00072: make_sock: could not bind to address [::]:80
* The apache2 instance did not start within 20 seconds. Please read the log files to discover problems
Most blogs advise "Find the process which is using TCP Port 80.", but such process it not running. Mmm....
root@ubuntu:/home/kotaro# netstat -ap
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 localhost:mysql *:* LISTEN 1159/mysqld
tcp 0 0 *:ssh *:* LISTEN 1057/sshd
tcp 0 0 172.16.45.169:ssh 172.16.45.1:49474 ESTABLISHED 1808/sshd: kotaro [
tcp6 0 0 [::]:ssh [::]:* LISTEN 1057/sshd
udp 0 0 *:bootpc *:* 901/dhclient
udp 0 0 *:11004 *:* 901/dhclient
udp6 0 0 [::]:9859 [::]:* 901/dhclient
I got the problem in "/etc/apache2/sites-enabled/000-default.conf".
Listen 80
ServerName www.abc.com
ServerAdmin webmaster@abc.com
DocumentRoot /var/www/html/abc
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
The line of "Listen 80" was not necessary. It looks Apache2 tried to use TCP Port 80 twice (default behavior and another one caused by my configuration), and naturally failed in the second attempt. I can understand I could not find any process using TCP Port 80 after apache2 gives up to start....
I was so careless because I simply followed the note in Apache 2.4 documentation without thinking anything. It was an easy mistake which I stuck in for 1 hour.....
NoteAfter removing "Listen 80" then, it worked....
The use of does not affect what addresses Apache httpd listens on. You may need to ensure that Apache httpd is listening on the correct addresses using Listen.
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