openEuler 21.03 offers refined functions of memory initialization, memory control, statistics, heterogeneous memory, and hot swap, as well as more effective user control interfaces. A series of optimizations (LSB) to reduce the differences between distributions. openEuler also complies with the Linux Filesystem Hierarchy Standard (FHS). This standard is a reference on how to manage the Linux file system

non-secure OSs based on hardware-assisted virtualization, trusted execution environment (TEE), and heterogeneous architectures. It utilizes the characteristics of each OS to meet the multi-objective constraints challenges: • Deployment of multiple OSs requires collaboration on the same multi-core (homogeneous or heterogeneous) SoC to implement system functions. • System isolation to prevent impact of failures, such shows the overall architecture of MICA. OS 1 OS 2 OS 3 OS 4 Lifecycle management Bare metal Heterogeneous architectures TEE ... Embedded virtualization Lightweight container LibOs Cross-OS communication

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.2 Unix-like filesystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.2.2 Filesystem internals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.2.3 Filesystem permissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 1.3.8 Virtual filesystem of MC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

.conf /tmp/fsmount 问题1：root用户无法访问挂载目录 测试发现client mount进程是哪个用户启动的就只有该用户(filesystem owner)可以访问该目录，即使挂载点mode是777。 # filesystem owner wanghai01@pubbeta1-nostest2:/tmp$ ls -l | grep fsmount drwxrwxrwx 0 p# cd fsmount bash: cd: fsmount: Permission denied© XXX Page 4 of 33 查阅资料发现这是fuse的一种安全策略，默认是只有filesystem owner拥有该文件系统的访问权限，如果想要其他用户有权访问，需要在挂载参数中指定‘-o allow-root’ 或'-o allow-other'以允许相应用户有权访问该文件系统，如果挂 This option overrides the security measure restricting file access to the filesystem owner, so that all users (including root) can access the files. allow_root

does not extend to Windows 95, 98 or ME, which continue to use the machine's local codepage for filesystem access. Regular Expression Library Updated Apache 2.0 includes the Perl Compatible Regular Expression start NN must be replaced with the current version number, and PREFIX must be replaced with the filesystem path under which the server should be installed. If PREFIX is not specified, it defaults to /usr/local/apache2 sections. These sections limit the application of the directives which they enclose to particular filesystem locations or URLs. They can also be nested, allowing for very fine grained configuration. Apache

does not extend to Windows 95, 98 or ME, which continue to use the machine's local codepage for filesystem access. Regular Expression Library Updated Apache 2.0 includes the Perl Compatible Regular Expression start NN must be replaced with the current version number, and PREFIX must be replaced with the filesystem path under which the server should be installed. If PREFIX is not specified, it defaults to /usr/local/apache2 sections. These sections limit the application of the directives which they enclose to particular filesystem locations or URLs. They can also be nested, allowing for very fine grained configuration. Apache

does not extend to Windows 95, 98 or ME, which continue to use the machine's local codepage for filesystem access. Regular Expression Library Updated Apache 2.0 includes the Perl Compatible Regular Expression start NN must be replaced with the current version number, and PREFIX must be replaced with the filesystem path under which the server should be installed. If PREFIX is not specified, it defaults to /usr/local/apache2 sections. These sections limit the application of the directives which they enclose to particular filesystem locations or URLs. They can also be nested, allowing for very fine grained configuration. Apache

does not extend to Windows 95, 98 or ME, which continue to use the machine's local codepage for filesystem access. Regular Expression Library Updated Apache 2.0 includes the Perl Compatible Regular Expression start NN must be replaced with the current version number, and PREFIX must be replaced with the filesystem path under which the server should be installed. If PREFIX is not specified, it defaults to /usr/local/apache2 sections. These sections limit the application of the directives which they enclose to particular filesystem locations or URLs. They can also be nested, allowing for very fine grained configuration. Apache

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 2.9 Mapping URLs to Filesystem Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 2.10 Dynamic Shared does not extend to Windows 95, 98 or ME, which continue to use the machine’s local codepage for filesystem access. Regular Expression Library Updated Apache 2.0 includes the Perl Compatible Regular Expression start NN must be replaced with the current version number, and PREFIX must be replaced with the filesystem path under which the server should be installed. If PREFIX is not specified, it defaults to /usr/local/apache2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 2.8 Mapping URLs to Filesystem Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 2.9 Security Tips does not extend to Windows 95, 98 or ME, which continue to use the machine’s local codepage for filesystem access. Regular Expression Library Updated Apache 2.0 includes the Perl Compatible Regular Expression NN must be replaced with the current minor version number, and PREFIX must be replaced with the filesystem path under which the server should be installed. If PREFIX is not specified, it defaults to /usr/local/apache2