From: Digestifier To: Linux-Admin@senator-bedfellow.mit.edu Reply-To: Linux-Admin@senator-bedfellow.mit.edu Date: Sat, 18 Sep 93 11:13:16 EDT Subject: Linux-Admin Digest #64 Linux-Admin Digest #64, Volume #1 Sat, 18 Sep 93 11:13:16 EDT Contents: Re: [Summary] /etc/shutdown by non-root (Valdis Kletnieks) Re: xlock and virtual consoles (Sunando Sen) Re: Slackware 1.0.2 & NET-2? (Eberhard Moenkeberg) Re: New bash and elm warning (M. Mueller) Re: xlock and virtual consoles (correction) (Sunando Sen) HELP O' NET GURUS: Networking problems with SLIP and 0.99pl12 (Mark Kassab) Re: Swap *file* (Norbert J. Girardi) Re: Slackware & TeX? (Warner Losh) Re: Swap *file* (Rafal Maszkowski) Re: New bash and elm warning (Simon J Ferrett) Re: Swap *file* (Linus Torvalds) Re: xlock and virtual consoles (Michael Riepe) Re: HELP O' NET GURUS: Networking problems with SLIP and 0.99pl12 (Charles Hedrick) Syslog setting (Savio Lam) Re: New bash and elm warning (Jeff Jennings) Re: [Summary] /etc/shutdown by non-root (David Kastrup) ---------------------------------------------------------------------------- From: valdis@black-ice.cc.vt.edu (Valdis Kletnieks) Crossposted-To: comp.unix.admin Subject: Re: [Summary] /etc/shutdown by non-root Date: 17 Sep 1993 20:23:03 GMT In article <27d35q$bol@agate.berkeley.edu> boss@soda.berkeley.edu (Brion Moss) writes: >(The script was then setuid root, of course). This seemed to work pretty >well. A set-UID root shell script is equivalent to giving every user on the system unrestricted root access. I suggest you find a way to do it without set-UID shell scripts. Valdis Kletnieks Computer Systems Engineer Virginia Tech ------------------------------ From: sens@FASECON.ECON.NYU.EDU (Sunando Sen) Subject: Re: xlock and virtual consoles Date: Fri, 17 Sep 1993 20:49:00 GMT In article fing0004@gold.tc.umn.edu (Michael S Finger-1) writes: >Is there any way to prevent a user from switching virtual terminals when xlock >is running? As a test I started xlock and to get back to the >console that I started x through and I was able to ctrl-c out of it and get >a prompt. Is there a way to prevent switching when xlock is running? The way I do it is this: I start X with the command `exec startx &', this starts X in the background and replaces my login shell with the shell started by the startx script. Then I switch back to the VT I started X from, and logout. > >I am not running xdm, I figured that running that will fix it, but I would like >to have it work both ways. >i > >Also, (I think this is in a FAQ, but I could not find it) when I run xdm I run >out of VT's and my machine hangs in a loop, how can I get xdm to release the VT >and regrab it again on exit of an xsession? Start xdm with the option `-nodaemon' and `-terminate'. I forget the exact syntax, it is in the man page. In fact, I start xdm directly from the inittab like this: xd:3:respawn:/usr/X386/bin -nodaemon -terminate Hope this solves your problem. Sunando Sen ------------------------------ Date: Fri, 17 Sep 93 00:39:41 +0100 From: Eberhard_Moenkeberg@p27.rollo.central.de (Eberhard Moenkeberg) Subject: Re: Slackware 1.0.2 & NET-2? Hello PERUCCI, and all others, on 14.09.93 PERUCCI, PHILIP A. wrote to All in USENET.COMP.OS.LINUX.ADMIN: >> Now, though, which method should be used for configuring TCP/IP? PP> Well, I went ahead with the NET-2 "howto". I get the same "network not PP> found" messages as with SLS v1.03. At ftp.gwdg.de:/pub/linux/install-mount/slack-info you will find what you have to configure (with examples for "subnetted class B net"). It is really simply nice (or nicely simple). :-) PP> Question: What is a good, recent version of the kernel source which will PP> work with the NET-2? What do you mean? Slack 1.02 is working good even in a subnetted B-class net, as well as SLS 1.03. Both are using kernel 0.99pl12. Greetings ... Eberhard ------------------------------ From: mm@lunetix.de (M. Mueller) Subject: Re: New bash and elm warning Date: 17 Sep 1993 23:44:12 GMT Jeff Jennings (jennings@lhotse.stortek.com) wrote: : Arjan de Vet (devet@adv.win.tue.nl) wrote: : : In article <1993Sep16.063001.23243@sifon.cc.mcgill.ca>, : : Martin-D. Lacasse wrote: : : I had this problem too in the beginning of using bash 1.13 beta. It turned : : out to be a bug in Elm 2.4. The fact that this bug does not show up when : : using bash 1.12 is a bug in bash 1.12 :-). It has been fixed in the latest : : release 2.4.21 (and maybe even earlier). : Well, I'm running bash 1.13 beta and elm 2.4.21, and I have the empty : message problem. Bash to bash 1.12... : - jeff I had this problem too, but switching to elm 2.4.22 solved it! ============================================================================= Martin Mueller | LunetIX Softfair, Mueller & Hetze GbR | Email: mm@lunetix.de | Lichtenrader Str. 41 | Tel.: +49 30 6227300 | 12049 Berlin | Fax : +49 30 6221075 ============================================================================= ------------------------------ From: sens@FASECON.ECON.NYU.EDU (Sunando Sen) Subject: Re: xlock and virtual consoles (correction) Date: Fri, 17 Sep 1993 22:55:15 GMT In article sens@FASECON.ECON.NYU.EDU (Sunando Sen) writes: Sorry, should have been more careful. >Start xdm with the option `-nodaemon' and `-terminate'. I forget the exact >syntax, it is in the man page. In fact, I start xdm directly from the >inittab like this: I just realised that xdm no such option called `terminate'. What I actually did was to put the following in /usr/X386/lib/X11/xdm/xdm-config: displayManager._0.terminateServer: true In any case, this is described in the xdm man page. > > xd:3:respawn:/usr/X386/bin -nodaemon -terminate This part is still right, thankfully. >Hope this solves your problem. And I hope I got it right this time. Sunando Sen ------------------------------ Crossposted-To: comp.os.linux.help From: mark@macs.ee.mcgill.ca (Mark Kassab) Subject: HELP O' NET GURUS: Networking problems with SLIP and 0.99pl12 Reply-To: mark@macs.ee.mcgill.ca Date: Fri, 17 Sep 1993 23:13:31 GMT I've been having networking problems with SLS 1.03, 0.99pl12, running SLIP. This problem has manifested itself in many forms. I've got my mtu set to 600, but I've tried other values... no success. Basically, the problem is that transfers from the local host to the remote host fail whether using NFS, rcp, or ftptool, whereas transfers from the remote host to the local host are successful. 1) NFS mounting: ================ I can successfully mount a partition from our Suns at school on my Linux (home) over SLIP. I can browse through the mounted partition, cat-ing files, etc... When I try to copy a file from my Linux machine onto the mounted partition, it seems to work for small files but gives an error for large files. Here's an example session: mark@olympus:[src] 489> df Filesystem 1024-blocks Used Available Capacity Mounted on /dev/hda4 226380 182528 32533 85% / /dev/hda1 163552 105792 57760 65% /dos defiant:/.export.home/mark 201167 125661 55390 69% /home/vlsi/mark mark@olympus:[src] 490> cd /home/vlsi/mark mark@olympus:[mark] 491> ls -l /etc/motd -r--r--r-- 1 bin bin 69 Aug 1 10:58 /etc/motd mark@olympus:[mark] 492> cp /etc/motd . mark@olympus:[mark] 493> ls -l motd -r--r--r-- 1 mark vlsi 69 Aug 1 10:58 motd * At this point, everything seems to be fine. I managed to copy this small * file. Now try to copy a larger file. mark@olympus:[mark] 494> cp /zImage . cp: ./zImage: Invalid argument * Now it gives this strange error. It seems to give the same error for all * large files whereas small files get copied successfully. * On the other hand, when copying files from Sun to Linux, they get copied * successfully no matter how large. 2) Transferring files using rcp: ================================ If I rcp a file from the Sun to my Linux machine, all goes well. However, when I try to do the opposite (i.e. transfer a file from Linux to Sun), a part of the file is transferred after which rcp just hangs 3) Transferring files using ftptool 4.3b3: ========================================== Regular ftp seems to work fine. However, when using the latest ftptool to transfer files from the local host to the remote host, and after part of the file is transferred (typically after 150K or so), the tool gives as error which is something like: Write on remote host failed. Disk full? The disk is certainly not full, and I have no quota limitations. Any ideas anyone? I'm totally clueless. Thanks in advance, Mark =============================================================================== Mark Kassab | Lab : (514)398-3937 | Keep stress out of your MACS Laboratory | Home : (514)934-3718 | life. Give it to others McGill University | Email: mark@macs.ee.mcgill.ca | instead. Montreal, Canada | m.kassab@ieee.org | =============================================================================== ------------------------------ From: girardi@rniil.rni.sub.org (Norbert J. Girardi) Subject: Re: Swap *file* Date: Fri, 17 Sep 1993 21:55:40 GMT nostofla (guest@hpacv.com) wrote: : Hello, : I am curious about a minor issue. : Have seen other articles make reference to a swap FILE (as opposed to a : swap partition). There is no manual page in my 99.9 for mkswap and the : faqs only seem to cover howto make a partition for swap. : Is there a way to make a swap FILE without creating a partiton : and could someone please tell me the command?? Find a partition with a *LOT* of free space in it. 'dd if=/dev/zero of=name_of_swap_file bs=8192 count=2048' will create a 16 MB file. 'mkswap ./name_of_swap_file 16384' will initialize the file as a swap-space 'swapon ./name_of_swap_file' activates the newly created and initialized swap-file 'free' shows the total amount of memory and swap space. - Norbert -- SSSSSS SQUAREDANCE is FRIENDSHIP set to MUSIC. S QQSQQQ Norbert J. Girardi < girardi@rniil.rni.sub.org > SSSQSS Q Voice: +49 621 493417 (h) +49 621 381-3260 (w) QQQQQQ If you know how to REPAIR YOUR SQUARE :-) drop me a line ------------------------------ From: imp@boulder.parcplace.com (Warner Losh) Subject: Re: Slackware & TeX? Date: Fri, 17 Sep 1993 21:18:35 GMT In article SSB1PZP@imcvms.med.navy.mil (PERUCCI, PHILIP A.) writes: >With Slackware 1.0.2 installed (1 day before 1.0.3 came out !@#$%) I >now would like TeX. Anyone know the command to use to install from the >SLS T* disks? If their scripts have the same interface as SLS, then it would be sysinstall -series t Warner -- Warner Losh imp@boulder.parcplace.COM ParcPlace Boulder I've almost finished my brute force solution to subtlety. ------------------------------ From: rzm@oden.oso.chalmers.se (Rafal Maszkowski) Subject: Re: Swap *file* Date: Sat, 18 Sep 1993 02:46:43 GMT Carsten Schulz-Key (schulzke@peanuts.informatik.uni-tuebingen.de) wrote: : Just do the following (as root): : dd if=/dev/zero of=/your/swapfile bs=1 count= : chmod 600 /your/swapfile : mkswap /your/swapfile : swapon /your/swapfile I have problems with seetting up second swap file on NFS mounted partition: rzm@dain:/usr/src,-1# mkswap /usr/src/swap 8096 Setting up swapspace, size = 8286208 bytes rzm@dain:/usr/src,0# swapon /usr/src/swap swapon: /usr/src/swap: Invalid argument rzm@dain:/usr/src,-1# swapon swap swapon: swap: Invalid argument rzm@dain:/usr/src,-1# The file is not owned by root and 666. Am I doing it wrong or it is still not possible in 0.99pl13? R. -- Rafal Maszkowski rzm@oso.chalmers.se rzm@mat.torun.edu.pl <-finger for public snail: Omgangen 464-82, 412-80 Goteborg, Sweden; tel: +46-31-7780831 key Opinia publiczna powinna byc zaalarmowana swoim nieistnieniem - S.J.Lec ------------------------------ From: c9108932@peach.newcastle.edu.au (Simon J Ferrett) Subject: Re: New bash and elm warning Date: Sat, 18 Sep 1993 06:44:41 GMT jhenders@jonh.wimsey.bc.ca (John Henders) writes: >isaac@elrond.physics.mcgill.ca (Martin-D. Lacasse) writes: >> To all those who installed the small beta release (announced >> a few days ago) of bash as /bin/sh: Be careful!! >> All your mail message sent by elm will have a correct >> header but might have an empty message. It took me a while to >> track this down since a few other changes have been made >> to my system in the mean time. >> Anyone else had this problem too? > YES!! Here I just logged in to report this, after spending the last >1/2 hour trying to figure out how I'd broken elm, and what do I see? I'm >not the first to notice. It's definately the new bash, as I restored >everything else to confirm. > Also, it's only elm that breaks. Sending mail with mailx and nn >works fine. I have a shell script that automatically launches term and etc etc (its quite long and complicated) that also broke when using the new bash... so either I was exploiting bugs (unknowingly) in the old one, or finding them in the new one... -- c9108932@cs.newcastle.edu.au - Simon Ferrett Due to technical difficuties, we are unable to bring you your regularly scheduled .signature - normal transmission will resume as soon as possible... ------------------------------ From: torvalds@klaava.Helsinki.FI (Linus Torvalds) Subject: Re: Swap *file* Date: 18 Sep 1993 10:28:28 +0300 In article <1993Sep18.024643.7987@nrao.edu>, Rafal Maszkowski wrote: > >I have problems with seetting up second swap file on NFS mounted partition: >rzm@dain:/usr/src,-1# mkswap /usr/src/swap 8096 >Setting up swapspace, size = 8286208 bytes >rzm@dain:/usr/src,0# swapon /usr/src/swap >swapon: /usr/src/swap: Invalid argument >rzm@dain:/usr/src,-1# swapon swap >swapon: swap: Invalid argument >rzm@dain:/usr/src,-1# > >The file is not owned by root and 666. Am I doing it wrong or it is still >not possible in 0.99pl13? As of 0.99.12 linux will mmap() files over NFS (readonly), but swapping over NFS is still not possible at this time, and nobody is working on it as far as I know. Linus ------------------------------ From: riepe@ifwsn4.ifw.uni-hannover.de (Michael Riepe) Subject: Re: xlock and virtual consoles Date: Sat, 18 Sep 1993 00:31:12 GMT Michael S Finger-1 (fing0004@gold.tc.umn.edu) wrote: : Is there any way to prevent a user from switching virtual terminals when xlock : is running? As a test I started xlock and to get back to the : console that I started x through and I was able to ctrl-c out of it and get : a prompt. Is there a way to prevent switching when xlock is running? I think `exec startx' might help. Ciao, Michael. -- Michael Riepe Universit"at Hannover Institut f"ur Fertigungstechnik und Spanende Werkzeugmaschinen Schlosswender Str. 5 W-3000 Hannover 1 (Germany) ... beware the storm that gathers here ("The Prophet's Song") ------------------------------ From: hedrick@geneva.rutgers.edu (Charles Hedrick) Crossposted-To: comp.os.linux.help Subject: Re: HELP O' NET GURUS: Networking problems with SLIP and 0.99pl12 Date: 18 Sep 93 08:01:26 GMT mark@macs.ee.mcgill.ca (Mark Kassab) writes: >I've been having networking problems with SLS 1.03, 0.99pl12, running SLIP. >This problem has manifested itself in many forms. I've got my mtu set to >600, but I've tried other values... no success. Basically, the problem is >that transfers from the local host to the remote host fail whether using NFS, >rcp, or ftptool, whereas transfers from the remote host to the local host are >successful. I wonder if you're having flow control problems or are overrunning a buffer somewhere. Modern modems tend to be setup up with tty speeds faster than the effective line speed, so they require that hardware flow control work. I'd check the settings on the modems, and also make sure that flow control is enabled on your machine, the machine at the other end, and both modems. ------------------------------ From: lam836@cs.cuhk.hk (Savio Lam) Subject: Syslog setting Date: Sat, 18 Sep 1993 02:52:49 GMT Reply-To: lam836@cs.cuhk.hk Since I started using SLIP, security becomes a concern. I would like to send a message to root whenever there is someone who attempts to login my machine from the outside. My /etc/syslog.conf contains this line: "auth.notice;mail.info root". This will send message to root even if I carelessly typed a wrong password from the VCs. Is it possible to set it up so that root is only notified for login failures from the outside (i.e. not from the VCs)? How about if I want the machine to "Beep" also? Thanks. Regards, Savio Lam. -- ############################################################################### # | _ # # ------------------------------- | _| |_ # # Lam Lai Yin, Savio | |_ _| # # | | | # # Internet: lam836@cs.cuhk.hk | / \ Can't live with DOS? # # Department of Computer Science | | DOS | # # Chinese University of Hong Kong | | | Try Linux... # # ------------------------------- | | | # # | ^^^^^^^^^^^^^ # ############################################################################### ------------------------------ From: jennings@lhotse.stortek.com (Jeff Jennings) Subject: Re: New bash and elm warning Date: Sat, 18 Sep 1993 13:37:28 GMT M. Mueller (mm@lunetix.de) wrote: : Jeff Jennings (jennings@lhotse.stortek.com) wrote: : : Well, I'm running bash 1.13 beta and elm 2.4.21, and I have the empty : : message problem. Bash to bash 1.12... : : - jeff : I had this problem too, but switching to elm 2.4.22 solved it! Yup, I just compiled elm 2.4.22 and everything works fine again. :-) - jeff -- Jeff Jennings | Imagination is more important than knowledge. Jeff_Jennings@stortek.com | - Albert Einstein Storage Tek - Iceberg | (~) Turn down your lights (~) LSVL 4 (303)673-7855 | U (where applicable) U GCS -d+ -p+ c++ l++ u+(++) e++ m+ s/+ n+(---) h---(*) f+(-) !g w+ t++ r- y+(*) ------------------------------ From: dak@hathi.informatik.rwth-aachen.de (David Kastrup) Crossposted-To: comp.unix.admin Subject: Re: [Summary] /etc/shutdown by non-root Date: 18 Sep 1993 14:23:26 GMT boss@soda.berkeley.edu (Brion Moss) writes: >What I did was, rather than create a user with /etc/shutdown as its shell, >to create a shutdown user with a shell which I called "shutoff", which >checked to make sure that nobody else was logged on and then called shutdown. >(The script was then setuid root, of course). This seemed to work pretty >well. >I post this both as a suggestion and to find out what's wrong with my idea. The problem with set user id root scripts is that it is easy to call them with an appropriately modified environment which will change the default bahaviour of the shell. For example, setting some weird aliases, or environment variables such as IFS, or even just the prompt string PS1 (which can contain `cmd` sequences) can then influence the shell script's behaviour in ways that are not always intended by the script writer. I cannot make any guesses about how your system works exactly, but shell procedures with suid root are not to be recommended. -- David Kastrup dak@pool.informatik.rwth-aachen.de Tel: +49-241-72419 Fax: +49-241-79502 Goethestr. 20, D-52064 Aachen ------------------------------ ** 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 ******************************