Professional programmer for 25+ years. Worked with Linux since kernel version 1.0.8. Occasional kernel developer with credits in the kernel source tree (under real name, not this psuedonym). Have run several distributions including Slackware, RedHat, Debian and Mandrake.
Work with several flavors of Unix on a daily basis, including AIX, HP-UX, Digital Unix, Solaris, FreeBSD,OpenBSD. Many years spent as an MVS Systems Programmer.
Proficient in C, Sys390 and x86 Assembler, etc.