There is a permit to allow members of group sun to read and execute.
permit 规则允许 sun 组的成员读和执行。
Thus, this command enables read and execute for all three constituencies.
因此，这个命令为所有的三类用户设置了读和执行权限。
chmod go+rx IBM: This command enables the read and execute privileges for group and others.
chmod go+rx IBM：这个命令为组和其他用户设置了读和执行权限。
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