let me create a file, and then modify the file to make several version

		
$ touch file
$ echo helloworld > file
$ cvs add file
cvs add: scheduling file `file' for addition
cvs add: use `cvs commit' to add this file permanently
$ cvs commit -m 'add file to cvs' file
/home/cvsroot/project_name/file,v  <--  file
initial revision: 1.1
$ echo I am Neo > file
$ cvs commit -m 'add file to cvs' file
/home/cvsroot/project_name/file,v  <--  file
new revision: 1.2; previous revision: 1.1
$ echo my nickname is netkiller > file
$ cvs commit -m 'modified file' file
/home/cvsroot/project_name/file,v  <--  file
new revision: 1.3; previous revision: 1.2
$ echo I am 28 years old > file
$ cvs commit -m 'modified file' file
/home/cvsroot/project_name/file,v  <--  file
new revision: 1.4; previous revision: 1.3
		
		

show log message

		
$ cvs log file

RCS file: /home/cvsroot/project_name/file,v
Working file: file
head: 1.4
branch:
locks: strict
access list:
symbolic names:
keyword substitution: kv
total revisions: 4;   selected revisions: 4
description:
----------------------------
revision 1.4
date: 2008-11-24 15:42:49 +0800;  author: neo;  state: Exp;  lines: +1 -1;  commitid: V0iuptfP43iETPrt;
modified file
----------------------------
revision 1.3
date: 2008-11-24 15:42:20 +0800;  author: neo;  state: Exp;  lines: +1 -1;  commitid: YWfYHFSV10duTPrt;
modified file
----------------------------
revision 1.2
date: 2008-11-24 15:41:47 +0800;  author: neo;  state: Exp;  lines: +1 -1;  commitid: 4iRs5fm1g9diTPrt;
add file to cvs
----------------------------
revision 1.1
date: 2008-11-24 15:41:28 +0800;  author: neo;  state: Exp;  commitid: zCWkxnWxLZHbTPrt;
add file to cvs
=============================================================================
		
		

cvs log -r1.2 file

$ cvs log -r1.2 file

RCS file: /home/cvsroot/project_name/file,v
Working file: file
head: 2.1
branch:
locks: strict
access list:
symbolic names:
        release_1_0_patch: 1.4.0.2
        release_1_0: 1.4
keyword substitution: kv
total revisions: 5;     selected revisions: 1
description:
----------------------------
revision 1.2
date: 2008-11-24 15:41:47 +0800;  author: neo;  state: Exp;  lines: +1 -1;  commitid: 4iRs5fm1g9diTPrt;
add file to cvs
=============================================================================