How To Use Etc In Linux

The etc passwd file has only one field for password information.

How to use etc in linux. Configure dns locally using etc hosts file in linux. To open it for editing use any of your favorite text based editors as shown. Etc services file contains a list of network services and ports mapped to them. To safely edit etc group file run. 192 168 56 1 ubuntu tecmint lan 192 168 56 10 centos tecmint lan.

Deny allow files in etc folder. Debian default mtools configuration file. To verify this open two terminal windows. Since there is only one field besides encrypted password other password related information cannot be stored in this file. Internet daemon is an important service in the linux world.

Run sudo vipw in one window and try to change the password of an user in another window. Now vipw and vigr commands will lock the etc passwd and etc group files and prevent others users from making any changes. Historically the etc passwd file used to store all login information in a standalone linux system. The mtools series of commands work with ms dos files and directories on floppy disks. Etc at allow keep users in this file to allow at jobs execution.

Later due to following reasons password information was moved in etc shadow file. Now open the etc hosts file using your editor of choice as follows sudo vi etc hosts then add the lines below to the end of the file as shown in the screen shot below. Etc at deny keep users in this file to deny at jobs execution. This file is used by the man db package to configure the man and cat paths. It takes care of all network services with the help of etc services file.

These are the files which contain what users are allowed denied for particular service what ip address are allowed denied to access our services etc. This allows you to use linux with ms dos formatted diskettes on dos and windows systems.