clearcaseclearcase中权限设置775,770分别代表什么，请详细解释下。

sccs是證什么證？

版本控制软件 一般的公司使用的版本控制软件大致如下： 1.Clear case --------〉中坚级 2.CVS --------〉开源奇葩 3.Visual SourceSafe --------〉入门级 4.PVCS --------〉小工作组级 5 Perforce --------〉 6.CCC --------〉元老级 7.StarTeam --------〉 8.RCS --------〉元老级 9.SCCS --------〉元老级 10．Hansky Firefly --------〉新秀级 11.Others（还有一些比较少见或某个公司专用的软件，如Seapine，北大青鸟的JBCM等）

如何搭建ClearCase的eclipse工作空间

Eclipse下面的ClearCase插件安装 1. 选择Eclipse->Help->Software Updates->Manage Configuration 2. 选择Manage Configuration页面右边的Add an Extention Location，将位置指定.rational.clearcase.win32-20041202 .zip解压缩的位置 3. 剩下的按照安装提示，安装完毕后，重新启动Eclipse，安装完毕

clearcase中权限设置775,770分别代表什么，请详细解释下。

400 read by owner 200 write by owner 100 execute (and directory search) by owner 700 read, write, and execute (and directory search) by owner 040 read by group 020 write by group 010 execute (and directory search) by group 070 read, write, and execute (and directory search) by group ) 004 read by others 002 write by others 001 execute (and directory search) by others 007 read, write, and execute (and directory search) by others