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qmail is a secure, reliable, efficient and simple MTA written by Dan J. Bernstein. It has been security bug free since 1998 and is freely available. But vanilla qmail does not support security mechanisms like SMTP authentication or support for SSL/TLS. While it supports RBL via tcpserver, it has no Anti-Spam-Features like checking the Envelope-From […] rpm -Uvh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm systemctl start nginx.service systemctl stop httpd.service yum remove httpd systemctl disable httpd.service root@centos71 ~]# systemctl start nginx.service [root@centos71 ~]# systemctl restart nginx.service [root@centos71 ~]# systemctl status nginx.service nginx.service – nginx – high performance web server Loaded: loaded (/usr/lib/systemd/system/nginx.service; disabled) Active: active (running) since Thu 2014-09-11 14:32:02 SGT; 8s ago Docs: http://nginx.org/en/docs/ Process: […] RAID A soft RAID vs Hard RAID: a> Software RAID is an abstraction layer in an OS between physical and logical disk, and this abstraction layer will consume some CPU resources. Hardware RAID is not the problem; b> can support hot-swappable RAID hard disks, the benefits of this can be brought online to replace a […] We collected a bunch of shell scripting skills, I said, I write a blog mainly to make some study notes, to facilitate their access to, so I would come up with such an article, there is no incomprehensible. About the origin of these skills, eh, I forgot, it may come from theunixschool, commandlinefu, cool ground […] RHEL6.4 Course Summary Unit1 Tracking Security Updates Update the following three categories RHSA RHBA RHEA yum updateinfo list View all updates yum updateinfo list –cve = CVE-2013-0755 View an update yum –security list updates view security update yum updateinfo list | grep ‘Critical’ | cut -f1 -d ” | sort -u | wc -l Unit2 […] IBM HTTP Server Performance Tuning IBM HTTP Server Performance Tuning 1. Determining maximum simultaneous connections 1.1. TCP connection states and thread/process requirements 1.2. Handling enough simultaneous connections with IBM HTTP Server on Windows / ThreadsPerChild setting 1.3. Handling enough simultaneous connections with IBM HTTP Server 2.0 and above on Linux and Unix systems 1.4. Handling […] mod_mpmstats mod_mpmstats provides three capabilities: check if the web server is at or near the maximum concurrent clients setting (MaxClients for Unix and Linux; ThreadsPerChild for Windows) optionally report the IHS worker thread usage at a specified interval optionally report the plug-in module where requests are currently stalled Often this type of monitoring has been […] Properties Description $0 The current record (as a single variable) $1~$n N-th field of the current record, separated by FS between fields FS Enter the default field separator is a space NF The number of fields in the current record is the number of columns NO The number of records have been read out, […] default Server Install Components Server Manager Update Name Static Content IIS-StaticContent Default Document IIS-DefaultDocument Directory Browsing IIS-DirectoryBrowsing HTTP Errors IIS-HttpErrors HTTP Logging IIS-HttpLogging Logging Tools IIS-LoggingLibraries Request Monitor IIS-RequestMonitor Request Filtering IIS-RequestFiltering Static Content Compression IIS-HttpCompressionStatic IIS Management Console IIS-ManagementConsole ASP.NET Workload Server Options Server Manager Update Name Static Content IIS-StaticContent Default Document IIS-DefaultDocument Directory […] Text Interval: ——– # Add a blank line after each line sed G # The original delete all blank lines and add a blank line after each line. # So that each line of text output later and only a blank line. sed ‘/ ^ $ / d; G’ # […] |
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