Bug in Bash shell allow attackers to execute code on Linux, Unix and Mac OSX

A security vulnerability in the GNU Bourne Again Shell (Bash), the command-line shell used in many Linux and Unix operating systems, could leave systems running those operating systems open to exploitation by specially crafted attacks. The bug, discovered by Stephane Schazelas, is related to how Bash processes environmental variables passed by the operating system or […]

Exit status

By default in Linux if particular command/shell script is executed, it return two type of values which is used to see whether command or shell script executed is successful or not. (1) If return value is zero (0), command is successful. (2) If return value is nonzero, command is not successful or some sort of error executing command/shell […]