Find user login history – last and lastb commands in Linux
last and lastb commands print the user login history. last prints the previous logged in users and lastb shows the failed login attempts.
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October 3, 2018
Dovecot: imap Error: open (/var/mail/username) failed
Resolution of the error Dovecot: imap Error: open (/var/mail/username) failed observed on a Postfix mail server site.
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October 3, 2018
tmpfs in Linux
In Linux, tmpfs resides in the main memory, giving fast file access and update times. tmpfs is explained with example commands.
October 3, 2018
Not able to access files on Android device in Nautilus from Linux desktop
After connecting Android device to a computer, files were not getting accessed. How to access files on Android device from Linux is explained.
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October 3, 2018
POSIX Shared Memory in Linux
How to do interprocess communication using the POSIX shared memory calls is explained with example client-server programs.
October 3, 2018
System V Shared Memory in Linux
How to do interprocess communication using the System V shared memory calls is explained with example programs.
October 3, 2018
POSIX Semaphores in Linux
POSIX semaphores provide a mechanism for interprocess synchronization. POSIX named and unnamed semaphores are explained with example programs.
October 3, 2018
POSIX message queues in Linux
POSIX message queue calls for interprocess communication (IPC) between processes are explained with an example of server and client programs in C under Linux.
October 2, 2018
Unable to establish a connection to adb
Unable to establish a connection between a project under Android Studio and adb. Solution to the problem is given.
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September 30, 2018
FIFOs in Linux
Any two processes can communicate using FIFOs in Linux. Interprocess communication using FIFOs is explained using a client-server example.
September 30, 2018