Author Archives: Ajitabh
Building A Highly Available Nginx Reverse-Proxy Using Heartbeat
A cluster in computing is a term used to describe a group of closely linked computers often appearing as a single entity to the outside world. There are various types of clusters—high-availability (HA) clusters, load-balancing clusters, compute clusters or high … Continue reading
Posted in FLOSS, Published Articles
Tagged Cluster, HA, Heartbeat, nginx, Reverse-Proxy
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Building A Highly-Available Web Server Cluster
nginx (pronounced as ‘engine x’) is a powerful HTTP Web server/reverse proxy and IMAP/POP3 reverse proxy. According to a survey conducted in December 2008 by Netcraft, nginx has grown significantly and has surpassed lighttpd (also known as Lighty). Because of … Continue reading
Posted in FLOSS, Published Articles
Tagged Cluster, HA, Load Balancing, nginx, Reverse-Proxy
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Recovering from lost root password in OpenBSD
Want to recover a lost root password in OpenBSD, type boot -s at the boot prompt in OpenBSD hit enter when prompted for shell and enter vt220 as the TERM. boot> boot -s Enter pathname of shell or RETURN for … Continue reading
Creating and Using MS DOS Virtual Machine in QEMU
Create a disk image of desired size. I chose 50 MB $ dd if=/dev/zero of=msdos622.img bs=1k count=0 seek=50000 Next boot from the DOS boot media. I had a bootable CD image. $ qemu -hda msdos622.img -cdrom DOS6.22_bootdisk.iso -boot d From … Continue reading
Creating and Using MS DOS Virtual Machine in QEMU
Being an old DOS user, sometimes there is an urge to go back to college days and recall how we used to do various things in DOS. Using dbase III, in a DOS environment reminds me of some of the … Continue reading