# File Operation **URL:** \ **Category:** Ruby\ **Created:** [October 26, 2009, 12:51pm UTC](https://www.ruby-forum.com/t/file-operation/177897 "2009-10-26T12:51:42Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![subhas123](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/d2c977/32.png) [@subhas123](https://www.ruby-forum.com/u/subhas123)\ **Post date:** [October 26, 2009, 12:51pm UTC](https://www.ruby-forum.com/t/file-operation/177897/1 "2009-10-26T12:51:42Z")
Can you tell me if I can move to a perticular Line number like ‘C’? ---
**Author:** ![subhas123](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/d2c977/32.png) [@subhas123](https://www.ruby-forum.com/u/subhas123)\ **Post date:** [October 26, 2009, 1:20pm UTC](https://www.ruby-forum.com/t/file-operation/177897/2 "2009-10-26T13:20:22Z")
2009/10/26 Subhas M. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid): > Can you tell me if I can move to a perticular Line number like ‘C’? What C library allows to “move to a particular line number”? I am not aware of something like that and it can work efficiently only if you have an index or lines with uniform length. Please look at IO#tell and IO#seek. If you want line by line jumping there is no other way as to read the file from the beginning and stop at the appropriate line number. The only option to speed that up is to build up an index of lines and then use IO#seek to position accordingly. If you also write to the file that approach will soon get very complicated. Kind regards robert ---
**Author:** ![subhas123](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/d2c977/32.png) [@subhas123](https://www.ruby-forum.com/u/subhas123)\ **Post date:** [October 26, 2009, 2:52pm UTC](https://www.ruby-forum.com/t/file-operation/177897/3 "2009-10-26T14:52:19Z")
Thanks Robert