System Architect Experience Summary

System Architect Experience Summary

1. Set server complex password to meet password robustness requirements
2. Shut down as little as possible, preferably using a reboot instead of the shutdown instructions. Do not use Shutdown–h now, but use reboot.
3. Set directory permissions with caution, the-R parameter needs to see if there is a space after the path.
4. RM–RF command less use, do not develop habits.
5. After installing the system, turn on the iptables firewall.

/sbin/iptables-a input-m State--state new-m tcp-p TCP--dport 22-j ACCEPT

/sbin/iptables-a input-m State--state new-m tcp-p TCP--dport 80-j ACCEPT

/sbin/iptables-a input-m State--state new-m tcp-p TCP--dport 3306-j ACCEPT

/etc/init.d/iptables Save

/etc/init.d/iptables restart

/etc/init.d/iptables status

Iptables–l–n to review firewall rules

1. History–c and Echo immediately after exiting or ending the operation >/root/.bash_history
2. When installing the system, do not restart the server or forcibly shut down when the CD is still in the optical drive, otherwise the installation media will be damaged.
3. Note that the keyboard and mouse and monitor installed in the system are installed properly.
4. You should disable SELinux after you install the system normally.

Modified after Vim/etc/sysconfig/selinux:

Selinux=disabled

selinuxtype=targeted

Restart complete after modification

1. System version and number of bits are determined through lsb_release–a and getconf long_bit
2. DNS polling is the simplest way to do load balancing.
3. Be sure to believe what you do personally, as long as you do not do things, you have to conduct a comprehensive inspection
4. Be sure not to use the software name, such as: mysql,nginx,php, such as the system hostname, because Ps–ef|grep nginx view service status, easy to cause misleading.
5. Network condition is not good, transfer files and data best use FTP.
6. Before update modifies a statement, be sure to select the result first and record it so that if you modify the log error, you can revert back to the value.
7. Work must be swift and decisive, to seize the point.
8. Server System time synchronization: Execute commands in Linux:

Yum Install NTP

/ETC/RC.D/INIT.D/NTPD start

Ntpdate 203.117.180.36

Crontab–e:

*/1 * * * root/usr/sbin/ntpdate 203.117.180.36 >/dev/null 2>&1

/etc/init.d/crond restart

and open the firewall UDP 123 port to ensure that the Utpdate service is running properly.

1. Note The configuration file is backed up when you modify the configuration file. Then, when modifying the configuration file, comment out the options, then add the options, configure the parameters, observe the comments below, semicolon or # pound sign.
2. When installing software on a Windows system, be sure not to install it in the system tray by default, to see the disk space at the installation location.
3. When installing software on a Windows system, the C-drive system disk allocates at least 30GB of space to provide temporary space for the installation of the application software. such as SQL SERVER 2005 or Symantec BackupExec 2010r3.
4. When visiting the website URL, be sure to add http://network protocol type, as well as host protocols such as FTP://must be entered.
5. When selling the customer service cloud host, the hard disk capacity unit is 1024, and the manufacturer's conversion unit is 1000. Note the units in which the conversion is made, give the client hard drive capacity, and use the computer to enter 1024 to be converted.
6. To do anything to focus on communication and communication, and must be careful, done to check, and the process of doing things and results to keep records. Timely experience and lessons learned.
7. and customers have direct contact, you should pay attention to the phone boot, call immediately answer, so as not to delay things, affect the work.
8. Steadfast work, Benbon life, must be enough effort!
9. More effective communication with customers, to avoid lied. At the same time, do not expose the company to the customer. Do your best to help customers solve problems, improve customer satisfaction with products and services.
10. Virtual machines built with virtualization KVM or Xen software under Linux are best set up and the system starts automatically. Otherwise, you will need to manually connect to the graphical interface to start the VM when the system starts up.
11. After the system restarts, be careful to check the service Condition of NFS, Remote mount NFS is prone to problems because NFS server NFS does not start and clients cannot use the data. And the client mount is best written to the/etc/fstab file, through the Mount–a can be implemented in the/etc/fstab file automatically mount.

System Architect Experience Summary