1.0 Problem Suppose there are n concurrent peer processes, where n > 1. All these processes have a checkpoint, which is an important point in the execution trace of the process. These processes need to be synchronized such that no process crosses its checkpoint before the others have reached their individual checkpoints. For example, a …
1.0 Introduction Regular expressions are used for searching strings in text files. A regular expression is a string of characters and may contain certain metacharacters. A metacharacter has a special meaning. A regular expression denotes a set of strings. Or, in other words, there is a set of strings that are matched by it. The …
1.0 Error The vi editor in Ubuntu Linux distribution is not showing color syntax highlighting in the edit window. 2.0 Solution vi is one of the original text editors of the UNIX operating system offering full screen text editing with excellent cursor movement, navigation, search, edit, copy, cut and paste capabilities. The equivalent program under …
vi not showing color syntax highlighting in Ubuntu Linux Read More »
1.0 SHA-2 A cryptographic hash function (CHF) is an algorithm to map arbitrary size data, called the message, to a fixed sized bit array, called the hash value, or message digest. It is a one way function. It is not feasible to generate the original message from the hash value. A small change in the …
Using sha256sum command for ensuring file integrity Read More »
Solution to the problem of not being able to access the guest OS from the host in VirtualBox is given with steps.
Solution to the problen of not able to mount VirtualBox Guest Additions CD image and installation of Guest Additions.
Resoution of the problem of “vboxdrv kernel module is not loaded” during the first time running of VirtualBox after installation.
Resolution of the error observed while running VirtualBox the first time, “No Bootable medium found. System halted”.
The dining philosophers problem is about deadlock in concurrent systems. The dining philosophers problem is explained with example programs.
1.0 Problem Simple Screen Recorder program records only a blank black screen on Ubuntu Linux. 2.0 Solution The problem is solved with the following steps. Close all programs. Log out. Start a fresh login procedure. Click on the user name. Before entering the password, find the gear icon in the bottom right corner of the …
Simple Screen Recorder records only a black screen Read More »
