|
|
|
|
|
|
|
|
Which library do I need to use for multithread applications? I
found pthread.h in /usr/include/, but I didn't find libthread.a in
/usr/lib/ as I can in AIX.
--
Ju Rao
Slackware
There is an excellent threads library available called
LinuxThreads. You can download the latest version
from ftp://ftp.inria.fr/INRIA/Projects/cristal/Xavier.Leroy/. [For more
information on LinuxThreads, see
http://pauillac.inria.fr/~xleroy/linuxthreads/.]
--
Chad Robinson
chadr@brt.com
Hi, I am a new user, and I have what I am sure is a simple
question. I upgraded the kernel from version 1.2. Now when I run games, I get an
error about a missing svgalib. Consequently, I cannot get any picture. I
am using an ATI 3D Expression with 2MB. How do I edit the config or lib
file in order to indicate which libraries I have?
--
Jonathan Barrie
Slackware
I'll bet you upgraded the libraries as well as the kernel. Nowadays, everything uses shared libraries, and programs can't run unless the right shared libraries are installed.
I'd try ldd <program> to check which libraries it finds and which it doesn't. Once you know which libraries are missing, you can then install the Slackware packages that provide them.
You can also run ldconfig -v to see which libraries are installed; if your program looks for a different version of a library already installed, look for ``backward compatibility'' packages.
Note that newer distributions trace dependencies between packets, so
you are unlikely to experience this error when using them.
--
Alessandro Rubini
rubini@linux.it
How do I customize the ``Login'' screens for TELNET and FTP
logins?
--
Robert Farrell
For TELNET, create and edit the /etc/issue.net file with whatever you wish to be displayed for the login screen. You can also edit the /etc/motd file to display the message of the day after someone logs in.
For FTP, go to the root directory of the FTP space (usually
/home/ftp/). You can verify the location and file names by looking in
/etc/ftpaccess. Edit the welcome.msg file to whatever you wish to be displayed. If
you want specific messages to be displayed when users enter into a
particular
directory, edit the .message file in that directory.
--
Mark Bishop
mark@tct-net.org
In a 50/50-mixed NT/Linux LAN of four to six servers, what is the
best tape backup scheme you recommend? Where should I install the
backup units--on the NT or Linux or both? What tape backup utilities
should I use? What if Solaris 2.5 servers are added?
--
Jon Chun
Red Hat
tar has always been the standard backup tool in the UNIX environment. If you want something more powerful, you should investigate cpio or afio, both of which are standard, command-line tools. BRU and other commercial backup facilities exist as well.
If you want to back up mixed NT and UNIX systems, you will most likely need to use a dedicated backup facility for the NT servers. A backup of NT is nice but backing up your domain server won't be very useful unless you include the registry settings, which only an NT backup tool can do.
The best possible solution is to install a tape drive in each server and use that server's own tools (NTBackup on NT, tar on UNIX) to back it up. That method will provide you with the fastest recovery times as you won't be restoring across the LAN.
If you don't need to cut costs, you can investigate ARCServe or another
commercial backup utility. These tools include clients for many platforms, and
you can probably get the SCO client working under Linux using iBCS2. That would
allow you to use a Windows NT machine to back up your UNIX servers.
--
Chad Robinson
chadr@brt.com
You can use the SMBFS functionality of the Linux kernel in order to mount remote NT servers on your Linux system:
smbmount //NT_SERVER//FOO /nt_serverThen you can save these directories with tar or any other backup utility.
A more efficient solution (but not free) is to use
commercial software such as ARKEIA or BRU which support remote NT/95
system backups.
--
Pierre Ficheux, Lectra Systèmes
pierre@lectra.com
I have a Teles ISDN card, which I would like to use under Linux.
After looking around a bit I found a driver in the Red Hat
distribution. So, I compiled a new kernel with support for the Teles card.
However, I have no idea how to use it. With a standard modem I can talk
with at commands to /dev/modem/, but how does it work with the ISDN
card?
--
Rien Broekstra
Red Hat
You need the isdn4k-utils. There are other packages, e.g., vbox for
building an answering machine, but this is basic. Check
ftp://ftp.franken.de/ or read
/usr/src/linux/Documentation/isdn/* for locations of additional
packages.
--
Ralf W. Stephan
stephan@tmt.de
I'm fairly certain that you didn't need to recompile your kernel. The Red Hat kernel packages build ISDN support as modules. (I'm sure they do as of 5.0, and I think we did in 4.2 as well.)
Anyway, the best place to find this type of information is in
/usr/src/linux/Documentation/isdn/README.HiSax/. Everything you need should
be covered there.
--
Donnie Barnes
redhat@redhat.com
It looks like your daemon is losing its temporary files; this can happen when users hang up without closing the connection. (Even though the user is causing it to happen, it should still be considered a bug.)
The easiest solution to the problem is to use cron to do a periodic check of /tmp with the following command:
find /tmp -daystart -atime 1 -exec rm \{} \;
--
Yes, this is possible. When Linux boots, you receive a message describing the partitions found on each drive. You can review these messages after Linux boots using the dmesg utility.
Primary partitions are numbered from 1-4, for example, hda3. Extended partitions will be numbered from 5 and up, so the first extended partition on drive hda will be hda5. Add an entry for this drive to your /etc/fstab file, and you will be able to mount it. You can test this manually by typing:
mount /dev/hda5 /mnt -t msdos -- Chad Robinson chadr@brt.com
How can I install Linux on an ESDI drive? The machine is an IBM
portable. The drive is not recognized by the following boot disks: bare,
SCSI and idecd.
--
Chriptopher Ochal
If the hardware is Micro Channel-based, you'll need to get a
modified boot disk from the Micro Channel Linux Home Page
(http://www.glycerine.itsmm.uni.edu/mca/). Instructions are
located at http://glycerine.itsmm.uni.edu/mca/general-goods.html#Slackware/.
--
Steven Pritchard
steve@silug.org
I started with Slackware 1.0.2, and top worked fine. I
recompiled the kernel for some reason, and top no longer worked. I installed 2.0.0 when it
was released and have patched it up to 2.0.31. top still
doesn't work. It thinks
for a moment then blows out, usually taking the xterm or rxvt
with it. I have downloaded all the supporting stuff listed as
required for 2.0, and I have installed more memory. free and ps
work fine. I do not have a clue where to look for top information.
Man pages don't have much. Help!
--
Bill
Make sure you are running the latest version of procps, available from ftp://sunsite.unc.edu/pub/Linux/system/status/ps/
Occasionally the layout of proc files changes, which breaks older versions of the ps utilities, including top.
You might also wish to make sure your termcap, curses
and ncurses are
all up-to-date.
--
Steven Pritchard
steve@silug.org
Many of the on-line resources referred to in this column are available on the SSC web pages. Sunsite mirror sites, FAQs and HOWTOs can all be found at http://www.linuxresources.com/. Answers published in Best of Technical Support are provided by a team of Linux experts.
If you would like to submit a question for consideration for use in this column, please fill out the web form at http://www.linuxjournal.com/techsup.html or send e-mail with the subject line ``BTS'' to ljeditor@ssc.com.