Answer / chinavenkanna babu

setuid:When setuid permission is set to an executable
file,if the user runs this executable file he is granted
access based on the owner of the file instead of who
started an executable file.we can set the setuid permission
on file # chmod 4555 executable_file

setgid:when setgid permission is set to the file in a
directory,the file belongs to the same group in which the
directory is a member.we can set the setgid permission on
file # chmod 2555 executable_file

Answer / p kumar

Setuid:If it is set on an executable file,cause it to run
under the user...
For example:/etc/passwd file is owned by root whici have
only read permision .....It will store all uaers encrypted
password..but users can still change their passwprd using
#passwd command ,,,bcz set uid bit is set for this file,,,
#ls -l /etc/passwd====it will show -wr--------s
#chmod u+s dirname

Stickybit:If it is set on a directory only the owner of a
file can delate the file.......only 4 directories...
/tmp dir iset by sticky bit....bcz any users can create &
delete file....but 2 prevent users from deleting each
others file...
#chmod o+t dirname....

What is the difference between > and >> operators?

6 Answers  

---

Give the command to display space usage on the UNIX file system.

6 Answers  

---

What is virtual memory?

2 Answers   BMC,

---

How to set Windows as Default OS when Dual Booting Ubuntu?

1 Answers  

---

What are permissions in UNIX?

5 Answers   BMC, University,

---

does the stat() function call use the inode of the file to generate the information about a file? what is inode mostly used for?

1 Answers   HP,

---

What is the number of the masked code ee@?

2 Answers   Accenture, Amazon, Amdocs,

---

Explain the read, write, and execute permissions on a UNIX directory.

1 Answers  

---

What are the mount and unmount system calls?

1 Answers   HCL,

---

In detail elaborate the system? What is driver?

0 Answers   BMC,

---

How to find the version details of unix? if any application is installed in unix OS how to find the version of that application is it possilbe or not? pls let me know cmd in detail.

5 Answers   HCL,

---

Name key files or directories on a Windows system that should always be backed up?

2 Answers  

---