许多程序使用这个setuid位以root身份运行,以获取它们需要更改系统文件的特权。 一个例子是passwd程序,它需要更改/etc/passwd文件。 2.17.1 Modifying Permissions 修改权限 To change permissions, use the chmod command. First, pick the set of permissions that you want to change, and then pick the bit to ...
process, add its PID to the argument list of the ps command. For example, to inspect the current shell process, you could use ps \$\$, because \$\$ is a shell variable that evaluates to the current shell’s PID. (You’ll find information on the administration commands top and lsof ...
CAPABILITY为cap_net_bind_service=+eip可让程序监听小于1024的端口。 setfacl 设置ACL权限。 setfacl -m {[d:]u:USERNAME:[r][w][x]}|{[d:]g:GROUPNAME:[r][w][x]}|{m:[r][w][x]} NAME -b:删除所有的ACL权限。 -d:设置默认的ACL权限。只对目录有效,在改目录下新建的目录和文件会使用此...
This chapter is a guide to the Unix commands and utilities that will be referenced throughout this book. This is preliminary material, and you may ...
Change the current directory to DIR. The default DIR</span><spanstyle="color: #0000ff;">is</span><spanstyle="color: #000000;">the value of the HOME shell variable. The variable CDPATH defines the search path</span><spanstyle="color: #0000ff;">for</span><spanstyle="color: #000000...
bash shell用一个叫作环境变量(environment variable)的特性来存储有关shell会话和工作环 境的信息(这也是它们被称作环境变量的原因)。这项特性允许你在内存中存储数据,以便程序 或shell中运行的脚本能够轻松访问到它们。 全局变量 局部变量 全局环境变量全局环境变量对于shell会话和所有生成的子shell都是可见...
set commands nv set evpn vni <vni-id> nv set evpn vni <vni-id> route-advertise nv set evpn vni <vni-id> route-advertise svi-ip (on|off|auto) nv set evpn vni <vni-id> route-advertise default-gateway (on|off|auto) nv set evpn vni <vni-id> route-target nv set evpn vni <vni...
SET JRE_HOME=d:\soft\java SET TNS_ADM=d:\Soft\InstanceClient\network\admin The default charset isUTF-8, to use another charset, just change theDBCLI_ENCODINGenvironment variable globally or in the mentioned config file. For example:
You can also identify the SQL Server version and build number for a target container image. The following command displays the SQL Server version and build information for themcr.microsoft.com/mssql/server:2022-latestimage. It does this by running a new container with an environment variablePAL...
Learn how to install the SQL Server command-line tools, Microsoft ODBC drivers, and their dependencies on Linux.