My most important professional Skills
I am famliliar with most of the unix system calls.
In 1993 I worked as a trainer for "Systemcall programming under UNIX".
I am an expert for the following Operating Sytems:
GNU, Unix, Linux, SuSE, Solaris, SunOS, RedHat, FreeBSD, Win*, Cisco IOS, Sinix, MS-DOS.
HP-UX, SCO-Unix, Minix, TANIX, RSX-11M, CP-M, C-64, AIX.
I started with the Internet in 1989, for this reason I probably was
one of the first 10.000 Internet specialists in Germany.
I worked in the Second Level Support at Sun Microsystems (1989)
as an consultant,
together with some network-engineering collegues I have managed projects,
mostly for international operating companies.
I have programmed a lot with TCP/IP and know the internas of
the most important services, like Telnet, FTP or NFS pretty well.
I gave lectures about topics "TCP/IP und NFS in practice" (1992),
"Networkprogramming under UNIX" and "Sytemprogramming under UNIX" (1993-95).
Heterogeneous Networks, Client/Server Implementations (real ones, not HTTP :-)),
TLI, Sockets, Firewalls (not installation, but design & implementation),
Security, Network and System managment, DNS,
ONC (Open Network Computing: RPC, NIS, NFS, OpenWindows (X11), PC/NFS).
DSL, ISDN, PPP, Ethernet.
Samba. news (INN), (send)MAIL, SSH.
I started with the World Wide Web in 1993.
As a systemprogrammer I have my fun
modifying and widening such services.
PHP, CGI, HTML, Java, Browser,
(Apache) Webserver, SSL, HTTP, HTTPS.
Programming Languages and Programming Tools
GNU, Ansi-C, gcc, libc, libg, Sun-C, Scripts, Perl, Perl/TK,
g++, MS-Visual C++.
CVS, RCS, SCCS, make, gdb,
dbx, awk, sed, Posix-Threads.
Emacs, Pascal, Basic, Java, dBASE, Clipper,
OpenWindows, Motif, X11
COBOL (RM + MicroFocus), Java-Script, Assembler (x86).
System and Network-Management
I spent substantial engineering time with this topic.
Approximately 4 men-years since 1993.
SNMP, MRTG, Big Brother, CA Unicenter TNG, Lance+.
I must admit, i am acquanted well with Win*, have developped about 2.5 years with NT.
Internet Service Provider
I started ISP-business in 1998.
Hosting and Server-Homing, firewalling, Security, IP-connectivity and
customer specific solutions.
Complete development of the IP-Accounting Software for automatic billing.
Configuration of Cisco gateway-router, coaching of
Unix-Cluster systems, Implementation of Firewall-Security Solutions and
Installserver for Unix-Systems.
From the beginning, I had to work with RDBMS in about every second project,
mostly as engineer and admin in one person.
But I always made that by the way, because necessary, it never was my primary job.
Programming, Embedded SQL (C), Oracle, MySQL.
Ingres, Informix, Clipper, dBASE.
Continue with these Links:
reusable Projects... chronological.
more about my professional history ... chronological.
more about me ... Overview.