umask 077

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umask values and permissions for files and directories 1.1-r parameter Setting directory permissions (chmod)650) this.width=650; "src=" Https://s1.51cto.com/wyfs02/M00/92/E8/wKioL1kE0rqgJo_gAAJVm7FRtqw248.png "title=" QQ picture 20170429225829.png

On the umask value of Linux system and its corresponding file permission explanationOriginal: http://blog.51cto.com/oldboy/1060032Origin:1, this article is written in particular to thank the 51cto blog staff and leadership, the old boy blog is

The simplest way to calculate umask values and file directory permissionsPermissions for directories created by default in Linux are 755[Email protected] data]# mkdir a[email protected] data]# LLTotal 4Drwxr-xr-x. 2 root root 4096 Apr 13:09

Umask-s Display the default permissions when a user creates a directory or filemkdir shuaige -ld shuaige View the current permissions of the Shuaige directory (the same as the default permissions above)Touch-l ABCD -l ABCD view abcd file Right

Linux cloud automated O & M course 4: linux cloud AutomationAutomated O & M for Linux I. vim   1. Move the vim cursor 1) In command mode : Number ### move to the specified row G ### last line of the file Gg ### first line of the file 2) In insert

文件权限的意义：系统最底层安全设定方法之一，保证文件可以被可用的用户作相应操作1. View of file propertiesls -l filename 等同于 ll filename （文件属性）ls -ld dir 等同于 ll -d dir （目录属性）-|rw-r--r--.|1| root| root| 46 |Oct 1 05:03 |filename1 2 3 4 5 6 7

1, the Linux file attributes; The properties of a Linux file or directory mainly include: The node of the file or directory, the type, the permission mode, the number of links, the users and user groups, the time of the most recent visit or

#!/bin/bash#设置密码复杂度If [-z] cat /etc/pam.d/system-auth | grep -v "^#" | grep "pam_cracklib.so" "];thenSed-i '/password required Pam_deny.so/a\password required pam_cracklib.so try_first_pass minlen=8 ucredit=-1 lcredit=-1 Ocredit=-1 dcredit=-1 retry=3

I. node information:Master1: 192.168.80.143/24 + CaMaster2: 192.168.80.144/24 The two nodes are the same as the master node and the slave of the other node. Ii. Basic Configuration: (1) MySQL is installed on both servers. # pvcreate /dev/sda5