Linux - SoftwareThis forum is for Software issues.
Having a problem installing a new program? Want to know which application is best for the job? Post your question in this forum.
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Introduction to Linux - A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
Click Here to receive this Complete Guide absolutely free.
Hi, I have a problem with the .profile file, in my Unix SCO is running a legacy application so, when i user try to run the application from a windows SO the open the software without problem and ask the user to put a user name and password, but the main problem is that when i do telnet to my unix box and ask me for user name for example if i put john and press enter and at the same time i press the delete key the user get the unix prompt so i dont know what can i do with this security weakness. By the way, each user havent got a password, i just define the user name with a password, i mean the just put the user name when the do telnet to the unix box.
It is not clear exactly what is happening. The login and password for both types of login should be the same. When accessing the application from Windows, are you using terminal emulation software or are the users using telnet? You should not be able to break the login with the delete key in either case. Is the application program being run from the .profile file?
I am using terminal emulation and the login and password is not the same for the unix box is different thant from the application, the problem is why if i press the delete key it goes to the prompt rather than goes to the application. This is i security vulnerability. isnt it.
Any time you telnet into a system you will be presented with a text shell for log in. This is normal operation. I do not know how to set it up, but there is a restricted shell that an outside user can telnet into. I beleive you can define exactly what programs a user can execute in a restricted shell. IE:
After the user logs into a restricted shell they are presented with a menu, and if the user tries to break out of the menu they can be logged out of the system.
Each user needs their own user name and password.
It sound to like you are trying to defeat unix security.
I think there is a secure shell that is part of SSH.
i have one user called generic that doesnt need password i mean i defined without password and i am using that user for 20 users more within the company so if i telnet the server for example:
c:\>telnet 10.x.x.x press enter
login: generic press enter
It goes into the legacy application but if at the same time that i pressed the enter key after i put the login name if i press the delete key it goes to the unix prompt i mean the generic user bypass the .profile and break into the unix shell rather than the legacy application.....Any idea.