From: Digestifier To: Linux-Admin@senator-bedfellow.mit.edu Reply-To: Linux-Admin@senator-bedfellow.mit.edu Date: Sat, 20 Nov 93 10:59:46 EST Subject: Linux-Admin Digest #176 Linux-Admin Digest #176, Volume #1 Sat, 20 Nov 93 10:59:46 EST Contents: Testing physical memory (Andrew Zwerin) Re: [Q] How to make a socket? (Remco Treffkorn) Supra Internal Modem, Dial-In ( Debbie MacLeod) Re: Berkeley Fast Filesystem (Piercarlo Grandi) Almost Free Linux Accounts (Ken Wilcox) Quickie security script? (Phil Perucci) Re: Help with slack 1.1.0 and named (Tilo Schuerer) Re: /dev/mouse: Device or resource busy ... help! (The BIG Boss) problems using FIPS (Miguel Angel Bayona) Re: lpfilter (Daniel Quinlan) lprm problems (Jose Manuel Moya) Re: No core dumped? (Kevin Brown) Re: Help with slack 1.1.0 and named (Matthew J. Ryan) Re: SLIP FAQ (Matt J. Carlson) Re: Printing to HP Jet Direct I/F (Andreas Bagge) Watcher... (Kenneth Walsh) Re: lpfilter (Bill C. Riemers) ---------------------------------------------------------------------------- From: zwerin@organ.cis.ohio-state.edu (Andrew Zwerin) Crossposted-To: comp.os.linux.help Subject: Testing physical memory Date: 19 Nov 1993 15:13:09 -0500 I may be experiencing some problems with my phisical memory. Does anyone know how I can test physical memory? Is there a utility to do this? Andy -- Andrew Zwerin (zwerin@cis.ohio-state.edu) ------------------------------ Crossposted-To: comp.os.linux.help From: root@hip-hop.sbay.org (Remco Treffkorn) Subject: Re: [Q] How to make a socket? Date: Fri, 19 Nov 1993 06:34:40 GMT Reply-To: remco@hip-hop.sbay.org dan@oea.hobby.nl wrote: : I accidentally erased /tmp/.X11-unix/X0 and I'm having trouble : recreating it. How do I go about making this socket? I'll most : likely reinstall XFree to get the socket back, but I'm curious! : -- : |< Dan Naas dan@oea.hobby.nl >| : +---------------------------------+ You don't have to. X is supposed to make it on startup. If it doesn't something is broken. -- Remco Treffkorn, DC2XT remco@hip-hop.sbay.org <<-- REAL reply address !! (408) 685-1201 ------------------------------ From: macleod@mendel.Berkeley.EDU ( Debbie MacLeod ) Subject: Supra Internal Modem, Dial-In Date: 19 Nov 1993 21:18:38 GMT I'm having problems getting a Supra 14.4 internal modem to answer the phone under Linux. Here's the problem: I have two modems connected to my Linux system, one an Internal Supra 14.4, and one an external Supra 14.4 connected to COM2. I can dial out of the internal Supra just fine, and I can dial in to the external supra just fine (running uugetty with a fairly stupid script in /etc/default/uugetty.ttyS1), in fact, I can dial out with the internal modem and dial into the external modem on the same machine, etc. (I have two phone lines). However, when I disable the external modem in /etc/inittab and enable the internal one, reboot, and try to dial in to the internal modem via the external modem, uugetty respawns as soon as the phone rings. Is there some setup I need to do? Or should I return the internal modem and get an external one? Oh, I set the board and serial port to use IRQ2 and said it was a 16550. Thanks ------------------------------ From: pcg@aber.ac.uk (Piercarlo Grandi) Subject: Re: Berkeley Fast Filesystem Reply-To: pcg@aber.ac.uk (Piercarlo Grandi) Date: Fri, 19 Nov 1993 21:08:17 GMT >>> On 19 Nov 93 03:40:20 GMT, a09878@giant.rsoft.bc.ca (Curt Sampson) said: Curt> Linux has its advantages over BSD, but the lack of FFS is not one of Curt> them. Enough with this! the ext2 fs is competitive with the FFS, and with Youngdale's clustering diffs soon, I think, to become standard, performance is as good or even way better, _without_ all the silly complications of fragmentation. ------------------------------ From: wilcox@exg106.rh.psu.edu (Ken Wilcox) Crossposted-To: comp.os.linux.misc Subject: Almost Free Linux Accounts Date: 19 Nov 1993 10:46:45 GMT Ok, I am doing this with some hesitation but I will do it anyway. We are going to allowing people from the Linux background access to our mini network. We have 2 Machines ( a 486DX50 running Slackware 1.1.0 which is the main NFS Server and a 386DX40 which is a Dataless client.) which are named kpw104.rh.psu.edu and exg106.rh.psu.edu. These machines are named this way because we are students at Penn State and this is how the Center for Academic Computing issues such accounts. These machines are sitting in our dorm rooms here. We are running what I like to refer to as "Cheap mans NIS". Which means that it is a pain in that &^$ to keep the UID's and groups and etc. the same on both machines, But so far so good. If you want more information about this system, there is going to be a first come, first serve system of giving out user accounts. We like to share with every one so this is why we are opening this up, (hopefully we will not get burnt). You must have a decent purpose for wanting to get an account. We are also doing this for the support that we can get from you. In order to apply for an account, telnet to either machine and login as guest. There is no password for this. It may take awhile to grant the account to you as we are students and have our own work to attend to. Any feedback about the system once the account has been established should be sent to either root, me (wilcox), Lance Knight (knight), Eylon Geva (geva), or Mike Cramer(cramer). {Mike is a little busy so please refer to the last group of people.} By the way, mail to either machine goes to the same place, so take your pick of machines to send to. I will be waiting to see the people that will apply and I hope that you can get some insight into the Linux environment (If you are getting started) or we can all learn together from this. -Ken Wilcox Ps. Disk space will be very limited so do not be surprised if you can not write that much. Any installation of software should be done by the "source" group. You can send mail to "source" if you want a program installed or if you want to become part of the source group, send mail to "accts" requesting such. ------------------------------ From: philp@universe.digex.net (Phil Perucci) Crossposted-To: comp.unix.admin Subject: Quickie security script? Date: 19 Nov 1993 17:58:36 -0500 Does anyone out there know a quick & dirty (or clean) way to provide additional security beyond /etc/passwd for logins? Ideally, I would like /etc/profile to start a task to kill the login in 30 seconds if a "magic command" is not entered. Any existing scripts/programs to do this would be greatly appreciated! ...or any alternative approaches ...or, just a way for a script started from /etc/profile to know the PID or user-id of the person logging in (I can handle the rest). BTW- the Unix dialect is Linux (Slackware 1.1.0) ...help! -- ============================================================================== Phil Perucci | "All postings are my own opinion - all comments Systems Programmer | are intended for research/educational purposes" ============================================================================== ------------------------------ From: tilo@cs.tu-berlin.de (Tilo Schuerer) Subject: Re: Help with slack 1.1.0 and named Date: 19 Nov 1993 12:05:22 GMT In article , vkoser@niblick.ecn.purdue.edu (Vincent R Koser) writes: > I have gotten to the point where my machine is on the net > and can find anything that is in the etc/hosts file. If > I try to telnet to anywhere other than machines listed in > here I get unknown host. I got the named running but > to no avail. I put my nameserver in the resolv.conf file > but it didn't help either. > I've got exactly the same problem! I tried several things but without success! When I try to find a name with nslookup my nameserver is responding the right name!!!!! Tilo ------------------------------ From: root@link.hacktic.nl (The BIG Boss) Subject: Re: /dev/mouse: Device or resource busy ... help! Date: 19 Nov 1993 07:32:41 -0000 Tom Varga (tom@ksr.com) wrote: : I've been trying to get X windows up and running when for some unknown reason, : my mouse driver seems to have gotten wedged. Trying to run startx or : test-mouse results in a complaint which looks like : : /dev/mouse: Device or resource busy : There must be a way out of this problem, or so I hope. I've tried everything : including rebooting, but no luck. : Please help! : Thanks in advance, : -- : -Tom If you have 'selection' running, that could be the problem, if so, kill it and try again.. else, look with 'fuser -vu /dev/mouse' to see if anything else is using the mouse.. Intruder.. -- ____________________________________________________________________________ Intruder@link.hacktic.nl pgp-key available on request, send empty mail to: public-key@link.hacktic.nl ------------------------------ From: mabp@gmv.es (Miguel Angel Bayona) Subject: problems using FIPS Date: Fri, 19 Nov 1993 12:17:08 GMT Hello there! I've got a Seagate 3550A 431 Mb in a single partition and i'm trying to repartitioning without backing up (sorry I'have no tape) the 200+ Mb of dos stuff. I've got FIPS version 08 and I've run into what a consider a bug. I'm trying to send the bug report to the writer of the FIPS application but i get all my post returned as 'Unknown user' the author is Arno Schaefer schaefer@silene.imag.fr anybody knows where can I get to him? regards! Miguel e-mail : mabayona@gmv.es ------------------------------ From: quinlan@aquarius.cs.bucknell.edu (Daniel Quinlan) Subject: Re: lpfilter Date: 19 Nov 1993 22:13:52 GMT Reply-To: quinlan@spectrum.cs.bucknell.edu rvk@isl.Stanford.EDU (Rick A. VanderKam) writes: >>1. Make sure your /bin/sh is actually bash, so you can use echo -ne bcr@bohr.physics.purdue.edu (Bill C. Riemers) writes: > I've just curious here, so I'll ask: > If the script requires bash, then why do you tell it to use "sh"? This > is the type of thing that drives me crazy. If I write a script the says: > #!/bin/sh > you can bet it'll work under /bin/sh. If I write script that says: > #!/bin/bash > you can bet it'll crash under /bin/sh. You could also bet that if > I have a shell that is closer to /bin/sh than bash, that is what I'll > have linked as /bin/sh. >>#!/bin/sh > As I said, why not: > #!/bin/bash - > There might be a very good reason why /bin/sh is prefered but for the > life of me I can't think of what it could be... > (The reason for the - is because lpr is a setuid program, so I'd like > to make doubly sure, no-one figures out a way to use this to escape to > a shell...) Bill is partially right here, what you "should" do is this... If you are using bash as you Bourne shell ("/bin/sh"), then what you should do is name it /bin/bash and symlink /bin/sh that it. If you are using the pdksh or ash or whatever, do the same. This way, you and your users are well reminded that /bin/sh is not a "true" Bourne shell. The reason I recommend using a symlink rather than a hard link is because it is much more "noticible" than a hard link. They also don't have that hard link "way of becoming their own file". I also do the same for my csh replacement, tcsh. So, in /bin, I have sh -> bash, and in /usr/bin, I have csh -> tcsh. Getting back to the main issue, #!/bin/sh should be used and tests done for the $BASH environment variable. Hard-coding #!/bin/bash is a bad idea. Coding anything to CRASH rather than report good error information is a BAD IDEA and poor programming, whether it is a shell scripts or C++ ... a bad practice. // Dan -- Daniel Quinlan ------------------------------ From: mpg93054@dit.upm.es (Jose Manuel Moya) Subject: lprm problems Date: Fri, 19 Nov 1993 14:12:37 GMT When I login as root there is no problem but any other user can't remove anything from the spool. It seems to be a problem on permisions of /usr/spool/lpd y lpr. I changed permisions of lpr and lpd to a+rx Then, lprm is accepted without errors but it doesn't dequeue anything. I have Slackware 1.1.0 Any help? Thanks in advance Note that my correct e-mail address is mpg93054@oasis.dit.upm.es and not what it seems to be (mpg93054@dit.upm.es) --- Jose Manuel mpg93054@oasis.dit.upm.es ------------------------------ Crossposted-To: comp.os.linux.development From: kevin@frobozz.sccsi.com (Kevin Brown) Subject: Re: No core dumped? Date: Fri, 19 Nov 1993 22:25:28 GMT In article <2cgic0$nq4@fbi-news.informatik.uni-dortmund.de> muenx@heike.informatik.uni-dortmund.de (Holger Muenx) writes: > >Guten Tag! > >During a major upgrade session on weekend I installed the kernel 0.99.13 and >libs 4.4.4. Everything seems to work fine, except the fact that programs >refuse to dump core. > >That's good news, you say. > >Not really: Those programs are buggy and cause segmentation faults and other >nasty problems. After a segmentation fault I do not find a "core" or >"core." file anywhere. Moreoever, in the message "Segmentation >fault" the usual "core dumped" is omitted. > >Does anybody else experience that problem? How can I get rid of it? It would seem that the core size limit now defaults to zero. In order to fix this, you need to put "ulimit -c " in your /etc/profile (if you're using bash) or the equivalent command for your shell in whatever place would be appropriate. Since the core size limit is a per-process value, I know of no way to change it on a system-wide basis other than by hacking the kernel or hacking init. -- Kevin Brown kevin@frobozz.sccsi.com This is your .signature virus: < begin 644 .signature (9V]T8VAA(0K0z end > This is your .signature virus on drugs: <> Any questions? ------------------------------ From: ryanm4@hall105.its.rpi.edu (Matthew J. Ryan) Subject: Re: Help with slack 1.1.0 and named Date: 19 Nov 1993 15:46:25 GMT In article <2cicq2$jsp@news.cs.tu-berlin.de>, Tilo Schuerer wrote: >In article , vkoser@niblick.ecn.purdue.edu (Vincent R Koser) writes: >> I have gotten to the point where my machine is on the net >> and can find anything that is in the etc/hosts file. If >> I try to telnet to anywhere other than machines listed in >> here I get unknown host. I got the named running but >> to no avail. I put my nameserver in the resolv.conf file >> but it didn't help either. >> > >I've got exactly the same problem! I tried several things but >without success! When I try to find a name with nslookup my >nameserver is responding the right name!!!!! > >Tilo This is solved by editing the /conf/net/host.conf. It should read something like this: order hosts,bind multi on The resolv.conf should look something like this: domain your.domain nameserver ip-num-of-local-nameserver You do NOT need to run named on your machine in order to have DNS. The only reason to have a named running on your machine is if your machine is going to be a nameserver. Also, this is a FAQ, and it is covered in the NET-2 HOWTO. Try reading the HOWTO's before posting a question - they aren't perfect, but they are helpful. - Matt -- "Still looking for a funky quote..." Matthew Ryan ryanm4@rpi.edu ------------------------------ From: mjc@wag.caltech.edu (Matt J. Carlson) Subject: Re: SLIP FAQ Date: 20 Nov 1993 00:33:19 GMT >>Take a look to the NET-2-FAQ and to the SERIAL-FAQ > >The NET-2-FAQ has been superceded by the NET-2-HOWTO posted to c.o.l.announce >just yesterday. I know of many people who are reading and relying on the I have used the (very nicely done) NET-2-FAQ and have still managed to fail to be able to get my SLIP connection with my school working. Does a SLIP-FAQ or SERIAL-FAQ exist that would assist me? (I can give lots of details about my system and the system I'm calling into if anyone cares, just won't waste bandwidth here with them yet...) Is it a problem with my dip program? I recently saw a patch for dip on c.o.l.announce aobout a dip patch for some kernel versions. I set up my Linux about a month or two ago using the SLS distribution. --> Do I have a buggy dip program? Thanks for any input. Matt -- ============================================================ O O Matt J. Carlson mjc@wag.caltech.edu \___/ rm 219 BI (818) 395-2764 HAVE A NICE DAY!! ============================================================ ------------------------------ From: bagge@gih.uni-hannover.de (Andreas Bagge) Subject: Re: Printing to HP Jet Direct I/F Date: Thu, 18 Nov 1993 18:09:22 GMT In article , shathaway@hampshire.edu (Stephen B. Hathaway) writes: > Hi, > I haven't been reading news lately, and I hope this is the right place to > post this. I'm trying to set up my linux box to our JetDirect > equipped LaserJet 4siMX, which, as far as I know, will act as an lpd. So, I > think I should be able to print to it. I have the HP Unix CD for It, but so > far it doesn't look like it has the answer for me. > > Has anyone gotten a system like this working? No, I don't think it acts like an lpd. But you can talk to the JetDirect Ethernet Card with the TCP/IP protocol. Have a look at the sources for hpnpf on your HP Unix CP (it is in the /usr/lib/hpnp/spoolersrc tree on my HP-UX system). It should compile with some minor changes. HP has a shell script which acts as filter: it captures the stdin and sends it with the hpnpf program to a special IP port (9100 as far as I remember) of the JetDirect card. You may try out the protocol by open a telnet session with telnet your.laserjet.IP.address 9100 Everything you type now is printed on the laserjet. -- ____________________________________________________________________________ Andreas Bagge E-Mail: bagge@gih.uni-hannover.de Geodaetisches Institut Nienburger Str.1 Tel: +49 511 762-4409 Universitaet Hannover D-30167 Hannover FAX: +49 511 762-2468 ____________________________________________________________________________ ------------------------------ From: ken@symphony.mp.ucc.ie (Kenneth Walsh) Subject: Watcher... Date: Fri, 19 Nov 1993 16:40:51 GMT Hi, Does anyone know of a program to Watch terminals(tty's) on a linux machine? Thanks Ken ------------------------------ From: bcr@bohr.physics.purdue.edu (Bill C. Riemers) Subject: Re: lpfilter Date: 19 Nov 93 16:04:50 GMT In article <1993Nov18.211253.558@EE.Stanford.EDU> rvk@isl.Stanford.EDU (Rick A. VanderKam) writes: >1. Make sure your /bin/sh is actually bash, so you can use echo -ne I've just curious here, so I'll ask: If the script requires bash, then why do you tell it to use "sh"? This is the type of thing that drives me crazy. If I write a script the says: #!/bin/sh you can bet it'll work under /bin/sh. If I write script that says: #!/bin/bash you can bet it'll crash under /bin/sh. You could also bet that if I have a shell that is closer to /bin/sh than bash, that is what I'll have linked as /bin/sh. >#!/bin/sh As I said, why not: #!/bin/bash - There might be a very good reason why /bin/sh is prefered but for the life of me I can't think of what it could be... (The reason for the - is because lpr is a setuid program, so I'd like to make doubly sure, no-one figures out a way to use this to escape to a shell...) Bill ------------------------------ ** FOR YOUR REFERENCE ** The service address, to which questions about the list itself and requests to be added to or deleted from it should be directed, is: Internet: Linux-Admin-Request@NEWS-DIGESTS.MIT.EDU You can send mail to the entire list (and comp.os.linux.admin) via: Internet: Linux-Admin@NEWS-DIGESTS.MIT.EDU Linux may be obtained via one of these FTP sites: nic.funet.fi pub/OS/Linux tsx-11.mit.edu pub/linux sunsite.unc.edu pub/Linux End of Linux-Admin Digest ******************************