RCS (Revision Control System)

# yum install -y rcs

ci - checkin (зарегистрировать)
co - checkout (проконстроллировать)

-l - lock
-u - unlock



# echo "123" > 123.txt


// Инициализировать файл
# ci -i 123.txt
123.txt,v  <--  123.txt
enter description, terminated with single '.' or end of file:
NOTE: This is NOT the log message!
>> .
initial revision: 1.1
done

// После инициализации файл пропадает, чтобы он появился, нужно выполнить следующую команду:

# co 123.txt
123.txt,v  -->  123.txt
revision 1.1
done

# ls
123.txt  123.txt,v


# cat 123.txt
123


=======================================================================

// Внесем изменения в файл.

// Предварительно его лочим
# co -l 123.txt
123.txt,v  -->  123.txt
revision 1.1 (locked)
done

// Вносим изменения
# echo "456" > 123.txt

// Регистрируем и снимаем лок.
# ci -u 123.txt
123.txt,v  <--  123.txt
new revision: 1.2; previous revision: 1.1
enter log message, terminated with single '.' or end of file:
>> .
done


=======================================================================

// Сравниваем ревизии
# rcsdiff -r1.1 -r1.2 123.txt
===================================================================
RCS file: 123.txt,v
retrieving revision 1.1
retrieving revision 1.2
diff -r1.1 -r1.2
1c1
< 123
---
> 456

==================================================

// Вернемся к копии 1.1 (как-то не с первого раза срабатывает)
# co -l -r1.1 123.txt
123.txt,v  -->  123.txt
revision 1.1 (locked)
done



# cat 123.txt
123



# ci -u 123.txt

==================================================



// Вернемся к ревизии 1.2 (как-то не с первого раза срабатывает)
# co -l -r1.2 123.txt
123.txt,v  -->  123.txt
revision 1.1 (locked)
done



# cat 123.txt
456

# ci -u 123.txt


==========================================================


# co -l 123.txt
123.txt,v  -->  123.txt
revision 1.1 (locked)
done



# echo "789" > 123.txt



# ci -u 123.txt
123.txt,v  <--  123.txt
new revision: 1.3; previous revision: 1.2
enter log message, terminated with single '.' or end of file:
>> .
done



=======================================================================


# rcsdiff -r1.1 -r1.3 123.txt
===================================================================
RCS file: 123.txt,v
retrieving revision 1.1
retrieving revision 1.3
diff -r1.1 -r1.3
1c1
< 123
---
> 789

=========================================================================

# rlog 123.txt

RCS file: 123.txt,v
Working file: 123.txt
head: 1.3
branch:
locks: strict
access list:
symbolic names:
keyword substitution: kv
total revisions: 3;	selected revisions: 3
description:
----------------------------
revision 1.3
date: 2014/01/07 21:05:40;  author: root;  state: Exp;  lines: +1 -1
*** empty log message ***
----------------------------
revision 1.2
date: 2014/01/07 20:47:15;  author: root;  state: Exp;  lines: +1 -1
*** empty log message ***
----------------------------
revision 1.1
date: 2014/01/07 20:41:51;  author: root;  state: Exp;
Initial revision
=============================================================================



=========================================================================
=========================================================================

// Вернемся к ревизии 1.2 (как-то не с первого раза срабатывает)
# co -l -r1.2 123.txt

# cat 123.txt
456

# ci -u 123.txt


# cat 123.txt
456

=========================================================================
=========================================================================

// Сделаем ревизию 1.4 а потом вернемся к ревизии 1.1


# co -l 123.txt
123.txt,v  -->  123.txt
revision 1.1 (locked)
done

# echo "1000" > 123.txt

# ci -u 123.txt
done


# cat 123.txt
1000


===========

// Вернемся к ревизии 1.1 
# co -l -r1.1 123.txt

# ci -u 123.txt


# cat 123.txt
123

=================================================

// Сравниваем, что было и что стало:

# rcsdiff -r1.1 -r1.4 123.txt
===================================================================
RCS file: 123.txt,v
retrieving revision 1.1
retrieving revision 1.4
diff -r1.1 -r1.4
1c1
< 123
---
> 1000



Посмотреть видео:
http://val.bmstu.ru/openvideo/rcs.html


Почитать:
http://www.gnu.org/software/rcs/manual/rcs.html

http://books.google.ru/books?id=mKgomQz5KH0C&printsec=frontcover&hl=ru#v=onepage&q&f=false
(купить эл. книгу 2003 года 200 стр за 650 руб. Да они там совсем укурились в своей Америке).