I‘ve used the mdadm command line utility to setup and manage software RAID 6 under Debian Linux server. However, I get the following message in /var/log/messages file:
[ 14.003707] JBD: barrier-based sync failed on md0-8 – disabling barriers
How do I fix the message ‘JBD error message “barrier-based sync failed”‘?
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I‘ve downloaded Backtrack Linux version 5 KDE desktop 64 bit. To start a graphical interface I’ typed startx command. But it failed with the following error message:
How do I fix this problem and install Backtrack Linux version 5 KDE desktop on my hard disk?
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I block or deny access based on the host name or IP address of the client visiting website under nginx web server. I want to display customized e403.html error page, but it doesn’t appear to be working. Nginx always displays the built-in, hardcoded “403 Forbidden” error message. Here is my configuration:
.....
...
deny 1.2.3.4;
deny 91.212.45.0/24;
deny 91.212.65.0/24;
.....
...
error_page 403 /e403.html;
location = /e403.html {
root html;
}
How do I fix this problem and display custom error 403 page under nginx server?
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I want find out if a command exists on UNIX from a bash shell script. If command does not exists, then I would like to display an error message on screen. How do I find out if a command exists on Posix system or not?
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When I run hdparm -tT /dev/sda command under CentOS / RHEL I get the following error on screen:
/dev/sda:
Timing buffered disk reads: 908 MB in 3.00 seconds = 302.39 MB/sec
HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device
How do I fix this problem?
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My CentOS Apache 2 (httpd) webserver will not start. It was working fine, but I made few changes to httpd.conf and it is not restarting. What are some things to check in order to solve my Apache server restart issues?
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