Re: [luau] Linux Console
Daniel J Nishimura wrote: Thanks Brian and Monmotha I hooked up my workstation to my linux box with a null-modem cable, but as Brian said, it still isn't a true console. The boot messages don't show up and the login prompt is the first thing to pop up. Brian, do you recommend any motherboards with a true console port? Thanks. -dan Hum, if you appended the console=ttyS0,bps to your kernel line in lilo.conf, you should at least get the kerenl startup messages. There's also a lilo.conf option to have lilo be available on the serial line (so tha tyou can hit shift to give params. see progress, etc). --MonMotha
Re: [luau] Linux Console
Thanks Brian and Monmotha I hooked up my workstation to my linux box with a null-modem cable, but as Brian said, it still isn't a true console. The boot messages don't show up and the login prompt is the first thing to pop up. Brian, do you recommend any motherboards with a true console port? Thanks. -dan On Thu, 25 Jul 2002, Brian Chee wrote: > 1.don't use hyperterminalit's had LOTS of wierd side effects. We've > especially had problems with it on embedded devices. Use teraterm > instead...still free, but MUCH better terminal emulation. Hyperterminal > actually prevented a linux based router from booting until I removed the > serial cable. It's also given me MUCH gas pain with QNX and VXworks based > RTOS machines. (real time operating systems for stuff like video appliances, > access points, switches, etc) > > 2.You're just needing a standard cross over cable...you can purchase one > from just about any computer store or make one. They're also called "lap > link serial cables" and that's what I tend to use all over my lab. They > have both a DB-25 and DB-9 at both ends so that I don't have to worry about > what kind of connector I have. > > 3.The technical term is a DTE to DTE cable. > > 4.Typically these are the pinouts normally used in cross over cables > (DB9 female to female): > > PC side:Server Side: > pin 2pin 3 > pin 3pin 2 > pin 4pin 6 > pin 5pin 5 > pin 6pin 4 > pin 7pin 8 > pin 8pin 7 > > Wacky Willy's on Kawaihao street has DB-9 to RJ-45 shells for under a buck > eachbest price in town. Just make sure you get the gender correct and > use a multimeter to check which pin goes where. > > 5.Lastly, most motherboards do not have the capability of using a serial > port as a true console device. (ala Sun sparcs) and thusly you don't get a > console until the linux/bsd/etc is up and running. Some of the Intel > motherboards do have a true serial console...the cool part about that is > that you can actually connect a terminal/console server (like the Lantronix > SSH terminal servers) to the console. I've created a airgapped network > (separate from the world) just for console devices (Networld+Interop calls > it "Access Ether") so that even if I'm getting dos'ed I can get into the > console and deal with it. I've done some of my servers and almost all of my > switches. That way I can get into a serial console without having to walk > all over my buildingeven better when you have to deal with a campus. > > /brian chee > > University of Hawaii ICS Dept > Advanced Network Computing Lab > 1680 East West Road, POST rm 311 > Honolulu, HI 96822 > 808-956-5797 voice, 808-956-5175 fax > > - Original Message - > From: "Daniel J Nishimura" <[EMAIL PROTECTED]> > To: "LUAU" <[EMAIL PROTECTED]> > Sent: Thursday, July 25, 2002 12:33 PM > Subject: [luau] Linux Console > > > > I was wondering if anyone could help me out here. I want to be able to > > console into my linux box via the COM port with window's hyperterminal > > program. I know I probably need a rj-45/serial port tranceiver and a > > rollover cable, or just use a serial cable, but are there special settings > > that I have to configure on the linux system? My linux OS is debian > > by the way. Thanks in advance. > > > > ___ > > LUAU mailing list > > [EMAIL PROTECTED] > > http://videl.ics.hawaii.edu/mailman/listinfo/luau > > ___ > LUAU mailing list > [EMAIL PROTECTED] > http://videl.ics.hawaii.edu/mailman/listinfo/luau >
Re: [luau] Linux Console
Brian Chee wrote: 1.don't use hyperterminalit's had LOTS of wierd side effects. We've especially had problems with it on embedded devices. Use teraterm instead...still free, but MUCH better terminal emulation. Hyperterminal actually prevented a linux based router from booting until I removed the serial cable. It's also given me MUCH gas pain with QNX and VXworks based RTOS machines. (real time operating systems for stuff like video appliances, access points, switches, etc) I agree. Hyperterminal can give you lots of headaches, but it usually works for me. 2.You're just needing a standard cross over cable...you can purchase one from just about any computer store or make one. They're also called "lap link serial cables" and that's what I tend to use all over my lab. They have both a DB-25 and DB-9 at both ends so that I don't have to worry about what kind of connector I have. 3.The technical term is a DTE to DTE cable. 4.Typically these are the pinouts normally used in cross over cables (DB9 female to female): PC side:Server Side: pin 2pin 3 pin 3pin 2 pin 4pin 6 pin 5pin 5 pin 6pin 4 pin 7pin 8 pin 8pin 7 Wacky Willy's on Kawaihao street has DB-9 to RJ-45 shells for under a buck eachbest price in town. Just make sure you get the gender correct and use a multimeter to check which pin goes where. 5.Lastly, most motherboards do not have the capability of using a serial port as a true console device. (ala Sun sparcs) and thusly you don't get a console until the linux/bsd/etc is up and running. Some of the Intel motherboards do have a true serial console...the cool part about that is that you can actually connect a terminal/console server (like the Lantronix SSH terminal servers) to the console. I've created a airgapped network (separate from the world) just for console devices (Networld+Interop calls it "Access Ether") so that even if I'm getting dos'ed I can get into the console and deal with it. I've done some of my servers and almost all of my switches. That way I can get into a serial console without having to walk all over my buildingeven better when you have to deal with a campus. This is a problem, but normally an inconsequential one. Most of the time, as long as the system can boot to a bootloader properly, the person won't need to access the BIOS config utility and such. LILO has an option to actually display all it's prompts on the serial console too. Most of the time, if you need to get into the BIOS config, enough stuff is wrong with the system you might as well hook a keyboard and video card up to it :) --MonMotha
Re: [luau] Linux Console
Daniel J Nishimura wrote: I was wondering if anyone could help me out here. I want to be able to console into my linux box via the COM port with window's hyperterminal program. I know I probably need a rj-45/serial port tranceiver and a rollover cable, or just use a serial cable, but are there special settings that I have to configure on the linux system? My linux OS is debian by the way. Thanks in advance. OK, hardware needed is a null-modem cable. If you have a bunch of cisco stuff, you can use their consoel cable (which is a rollover cable) and two of the DB9 to RJ45 converters. Special settings: Make sure your kernel has console on serial port enabled. This is a compile time option under character devices. Add to the kernel line (in lilo use append=) "console=ttyS0,9600" (replace 9600 with the bit rate of the serial line that you want to use and replace ttyS0 with the serial port). Go to /etc/inittab. Make sure there's a getty running on ttyS0 (or whatever) so that you can log in. Reboot; everything should show up on the serial console and you should get a login prompt as usual. I use this for my floppy routers sometimes. --MonMotha
Re: [luau] Linux Console
1.don't use hyperterminalit's had LOTS of wierd side effects. We've especially had problems with it on embedded devices. Use teraterm instead...still free, but MUCH better terminal emulation. Hyperterminal actually prevented a linux based router from booting until I removed the serial cable. It's also given me MUCH gas pain with QNX and VXworks based RTOS machines. (real time operating systems for stuff like video appliances, access points, switches, etc) 2.You're just needing a standard cross over cable...you can purchase one from just about any computer store or make one. They're also called "lap link serial cables" and that's what I tend to use all over my lab. They have both a DB-25 and DB-9 at both ends so that I don't have to worry about what kind of connector I have. 3.The technical term is a DTE to DTE cable. 4.Typically these are the pinouts normally used in cross over cables (DB9 female to female): PC side:Server Side: pin 2pin 3 pin 3pin 2 pin 4pin 6 pin 5pin 5 pin 6pin 4 pin 7pin 8 pin 8pin 7 Wacky Willy's on Kawaihao street has DB-9 to RJ-45 shells for under a buck eachbest price in town. Just make sure you get the gender correct and use a multimeter to check which pin goes where. 5.Lastly, most motherboards do not have the capability of using a serial port as a true console device. (ala Sun sparcs) and thusly you don't get a console until the linux/bsd/etc is up and running. Some of the Intel motherboards do have a true serial console...the cool part about that is that you can actually connect a terminal/console server (like the Lantronix SSH terminal servers) to the console. I've created a airgapped network (separate from the world) just for console devices (Networld+Interop calls it "Access Ether") so that even if I'm getting dos'ed I can get into the console and deal with it. I've done some of my servers and almost all of my switches. That way I can get into a serial console without having to walk all over my buildingeven better when you have to deal with a campus. /brian chee University of Hawaii ICS Dept Advanced Network Computing Lab 1680 East West Road, POST rm 311 Honolulu, HI 96822 808-956-5797 voice, 808-956-5175 fax - Original Message - From: "Daniel J Nishimura" <[EMAIL PROTECTED]> To: "LUAU" <[EMAIL PROTECTED]> Sent: Thursday, July 25, 2002 12:33 PM Subject: [luau] Linux Console > I was wondering if anyone could help me out here. I want to be able to > console into my linux box via the COM port with window's hyperterminal > program. I know I probably need a rj-45/serial port tranceiver and a > rollover cable, or just use a serial cable, but are there special settings > that I have to configure on the linux system? My linux OS is debian > by the way. Thanks in advance. > > ___ > LUAU mailing list > [EMAIL PROTECTED] > http://videl.ics.hawaii.edu/mailman/listinfo/luau
[luau] Linux Console
I was wondering if anyone could help me out here. I want to be able to console into my linux box via the COM port with window's hyperterminal program. I know I probably need a rj-45/serial port tranceiver and a rollover cable, or just use a serial cable, but are there special settings that I have to configure on the linux system? My linux OS is debian by the way. Thanks in advance.
