I got this error when I tried to send an email to a local user using outlook express, and as an unauthorized person. If I check the option “my server needs authentication” on, and input the correct account information that…
I got this error when I tried to send an email to a local user using outlook express, and as an unauthorized person. If I check the option “my server needs authentication” on, and input the correct account information that…
If you’ve read about my tutorial on setting up Postfix, you should be able to send and receive emails now. But life never goes smooth always. You may encounter this or that problem in using the email system. To solve…
Today, my website is down.
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service httpd status httpd dead but pid file exists |
This problem persists even I restart httpd. I have to look into the apache log to investigate what happened. Where is the apache log? I know the location of the error/access log for the…
Certification is frequently used in secure communication such as https and smtps. Certification contains the subject information and its public key, and a signature. The signature is generated by encrypting the hash of the subject information and its public…
Sure, you can use an email client such as outlook to send emails, but openssl can help you debug the problems when you set up/configure your own email system. After issuing the following command,
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openssl s_client -connect domainhostseotool.com:465 |
You can see the…
I like digitalocean’s tutorials about setting up servers and VPS, which is usually easy to understand, and if not (like this Postfix tutorial), at least works! I composed a tutorial about setting up sendmail. In that tutorial, you can see…
If you wrote rewrite rules, you may get confused by the rewrite and redirection. What happens if you write the following RewriteRules?
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RewriteRule test1.html test2.html RewriteRule test2.html test3.html |
If you type http://domainhostseotool.com/test1.html , the browser will display the content of test3.html while the url in…
You must know the standout redirection: ls > file The output of ls is now saved in file “file”. This is equivalent to: ls 1>file Note that there is no space between 1 and >. 1 is the file descriptor…
On CentOS6, the version of mysql is typically V5.1. mysql -V mysql Ver 14.14 Distrib 5.1.73, for redhat-linux-gnu (x86_64) using readline 5.1 rpm -q mysql mysql-5.1.73-7.el6.x86_64 rpm -qa|grep mysql mysql-libs-5.1.73-7.el6.x86_64 php-mysql-5.3.3-47.el6.x86_64 mysql-5.1.73-7.el6.x86_64 mysql-server-5.1.73-7.el6.x86_64 Sometimes you may want to upgrade mysql…
Sometimes you may want to temporally shut down your website to do some maintenance work. Stopping the httpd service may not be a good choice for you because you have other websites on the same host. You may think you…