На свом првом послу из колеџа у 1991, Имао сам срећу да се раде за компаније за производњу са 13 Локације, not including its corporate HQ in New Jersey. I joined just when the company was rolling out a new ERP system. We were a small IT department of about ten people altogether, two of whom Did Not Travel. Part of the project involved replacing IBM System 36 boxes with HP hardware and HPUX. Everyone used green tubes to access the system.
Пројекат ролнице заједно и ја сам послао доле у Балтимор с нови сарадник, Jeff. Our job was to power up the Unix box, проверите да ли је О / С је покренут, инсталирајте ЕРП систем, конфигурисање ЕРП, train people on the ERP and do custom work for folks on the spot. (То је био посао из снова, посебно што долази право из колеџа). Before we could really get off the ground, нам је потребно да распакујете све зелене цеви, put them on desks and wire them. And the best part was that we had to put the RJ11 connectors on ourselves.
Из неког разлога никада нисам разумео, а заправо никада није мислио да питам у то време, имали смо неке уговарање компанија дође и покренути кабл током постројења, but we didn’t have them put on the connectors. Тако, there was a "patch box" with dozens of of unlabeled cables in the "computer room" и то мазнуо око зграде на разним местима у згради.
Радили смо наш пут кроз њу током викенда, тестирање провода, стављање на конектор (уверивши се да је стрејт вс. прешао), обезбеди да битни поставке на зеленим цеви и штампаче тачни, labeling wires, making sure that "getty" was running correctly for each port and probably a thousand other things that I’ve suppressed since then. It all came together quite nicely.
Али, there was one important cable that we couldn’t figure out. The plant in Baltimore had a relationship with a warehousing location in New Jersey. Some orders placed in Baltimore shipped out of that location. There were two wires that we had to connect to the HPUX box: a green tube and a printer. The green tube was easy, али штампач претворио у ноћну мору три недеље.
Ако не знате, или су га потискује, бави зеленим цеви и штампача на овај начин, there are various options that you deal with by setting various pins. 8-бит, 7-бит, паритет (чак / Одд / ноне), probably others. If you get one of those settings wrong, цев или штампач и даље показује ствари, али то ће бити укупно бесмислице, or it will be gibberish with a lot of recognizable stuff in between. Наравно, these pins are hard to see and have to be set by using a small flat-edge screw driver. And they are never standard.
Ми смо поставили први у низу брзих позива са Њ типом (оседео рачунара који вероватно мрзи нас псује до данас). We got the green tube working pretty quickly, but we couldn’t get the printer to work. It kept "printing garbage". We would create a new RJ11 connector, switching between crossed and straight. We would delete the port and re-created in Unix. We went through the arduous task of having him explain to us the pin configuration on the printer, никада није сигуран да ли је он то радио исправно.
Крајње је време да се иде уживо, све је у Балтимору зуји, али не можемо добити проклети штампач у Њ да ради! We’ve exhausted all possibilities except for driving back up to NJ to work on the printer in person. To avoid all that driving, we finally ask him to fax us what he’s getting when it’s "garbage", надајући се да ће можда бити неки траг у том смећу које ће нам рећи шта радимо погрешно.
Када смо добили факс, we immediately knew what was wrong. Видети, our method of testing whether we had configured a printer correctly was to issue an "lp" команда овако:
лп / етц / пассвд
У основи, we printed out the unix password file. It’s always present and out of the box, always just one page. You standard Unix password file looks something like this:
ковач:*:100:100:8-74(канцеларија):/хоме / Смитх:/уср / бин / сх
:*:200:0::/хоме / гост:/usr/bin/sh
We had been printing out the password file over and over again for several weeks and it was printing correctly. Међутим, крајњем кориснику, it was "printing garbage".
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