chmod 400 meaning

The chmod command can change permissions for all subdirectories, there are 2 waysChange permissions for a file: chmod mode File|dirTo change permissions for all subdirectories: chmod mode dir-r Note that a-R parameter is appendedThe parameter is the

Linux basics, Linux file and folder permissions, do not have 777 permissions. Online tutorials are too complex?? The プ of the horse flies?.. First, view Linux file permissions Ls-l (General)LL (Ubuntu applies, equal to Ls-al) Second, the

Set permissions for directories and files under Linux, including recursive recursion settings for subdirectoriesThe chmod command can change permissions for all subdirectories, there are 2 waysChange permissions for a file: chmod mode File|dirTo

to the permission. In the previous section on Linux Users and user master management, in fact, their nature (or the user and user groups appear in the original intention) are convenient rights management. The importance of rights management for

Work of some content, this is China Mobile group's current Linux machine security compliance standards, find some time to classify it, and check out some information, what each configuration means, not only to know it, but also to know its why. A

RABBITMQ Cluster High AvailabilityRABBITMQ is developed with Erlang, which is very handy because Erlang is inherently a distributed language, but it does not natively support load balancing.Rabbit mode is roughly divided into the following three

Anti-DDoS: CC attack defense system deployment1. System effect this DDOS Application Layer defense system has been deployed on the http://www.yfdc.org site (if access fails, please directly access the server in China http: // 121.42.45.55 for online

A Brief introductionKeepalived+lvs+mysql Primary master replication is a much more frequently used MySQL high-availability scheme, in which LVS provides read load Balancing, keepalived the virtual VIP drift to achieve self-failover, while MySQL is

1. Introduction1.1. Official website: https://www.rabbitmq.com/2. Installation and configuration:See: Https://docs.openstack.org/ha-guide/shared-messaging.html#rabbitmq-configure2.1. Install: Do it on each nodeInstalled directly with Yum, the

Samba is all called the server Message block, the information service blocks, mainly used to implement Linux and Windows file sharing.First, basic configuration optionsThe main configuration files are/etc/samba/smb.conf, configuration files are