some domains work but some dont?
i m using Fedora Core2 with DA installed
my server hosted 25 domains
but there are some strange problems.
1) sometimes, some domains are working, but some don't.
i need to wait until the domains work again
2) for example, xxx.com can be visited, but sub.xxx.com cannot!
3) abt FTP. sometimes again=(
sometimes, i can connect to ftp.xxx.com
but sometimes it doesnt work, i need to del 'ftp.' -> xxx.com to connect
some clients dont use domains (.com, .net)
but they use sub-domain(xxxx.mydomain.com) as it is free
i type xxx.mydomain.com in the domain fill when i am creating the user, am i correct?
i wonder if it is the dns problem...
just now, a client have told me many images on his page are broken, but when i took a look, its ok-.-
he said when he browsed the link of the images in IE, an error occured:
Network Error (dns_server_failure)
Your request could not be processed because an error occurred contacting the DNS server.
The DNS server may be temporarily unavailable, or there could be a network problem.
but i cant find this problem...
the server load is always low...
Cpu(s): 0.0% us, 0.7% sy, 0.3% ni, 98.7% id, 0.2% wa, 0.2% hi, 0.0% si
but....
Tasks: 185 total, 1 running, 183 sleeping, 0 stopped, 1 zombie
Cpu(s): 0.0% us, 1.2% sy, 1.7% ni, 96.5% id, 0.0% wa, 0.3% hi, 0.3% si
Mem: 1027536k total, 1007424k used, 20112k free, 120292k buffers
Swap: 2040244k total, 0k used, 2040244k free, 688048k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
11272 mysql 22 6 122m 47m 3912 S 2.0 4.8 0:11.46 mysqld
15216 apache 19 4 0 0 0 Z 1.7 0.0 0:00.06 httpd <defunct>
15223 root 16 0 2044 972 1620 R 0.7 0.1 0:00.05 top
14946 apache 20 4 44076 22m 34m S 0.3 2.3 0:01.38 httpd
14968 apache 19 4 44156 24m 34m S 0.3 2.4 0:01.18 httpd
15083 apache 19 4 44216 21m 34m S 0.3 2.2 0:00.65 httpd
15097 apache 19 4 43988 21m 34m S 0.3 2.1 0:00.53 httpd
15195 apache 19 4 42292 18m 34m S 0.3 1.8 0:00.14 httpd
15206 apache 19 4 42488 18m 34m S 0.3 1.8 0:00.09 httpd
can anyone kindly tell me why these happened?
