Dovecot: imap Error: open (/var/mail/username) failed
While configuring mail on a Ubuntu Linux server running the Postfix mail server and Dovecot IMAP server, the following errors were observed in the mail log files, dovecot: imap(user1): Error:…
While configuring mail on a Ubuntu Linux server running the Postfix mail server and Dovecot IMAP server, the following errors were observed in the mail log files, dovecot: imap(user1): Error:…
1.0 tmpfs tmpfs is a filesystem that resides in the main memory of a Linux system. tmpfs stands for temporary file system. In the case of disk files, a file…
1.0 Error After connecting an Android based phone with a Linux desktop using the USB cable, the files on the device are not shown by the Nautilus file manager. After…
Shared Memory Shared memory is an inter process communication (IPC) mechanism in Linux and other UNIX-like systems. Based on input parameters, the kernel provides a (shared) memory segment to the…
Shared Memory Shared memory is one of the three inter process communication (IPC) mechanisms available under Linux and other Unix-like systems. The other two IPC mechanisms are the message queues…
Semaphores Semaphores are used for synchronization of processes and threads. Semaphores are clubbed with message queues and shared memory under the Interprocess Communication (IPC) facilities in Unix-like systems such as…
1.0 Problem After opening an Android project in Studio running under Ubuntu 15.04 Linux, the following error was displayed, Unable to establish a connection to adb. This usually happens if…
FIFO FIFOs are pipes with a name and are also commonly referred to as named pipes. Pipes are common on Linux command lines but do not have a system-wide name.…
Process The process is a fundamental concept in operating systems. The operating system kernel executes a program by creating a process. A process executes a program. A process has three…