Quick Hacks IV

Summary:

• {-> 7.1} mod_php3 in ML 7.0 and 'high' security level
• {= 7.0} "No more processes at this runlevel" during boot
• {-> 7.1} GNU/Linux doesn't detect more than 64 MB of RAM
• {-> 7.1} Acrobat Reader Crashes (Segfault)
• {= 7.1} ISDN doesn't work

{-> 7.1} mod_php3 in ML 7.0 and 'high' security level

(Contributed by Steven Mc Farling, edited)

"I have found it is the "security level" that made mod_php not work. If I install (all other things the same) with a security level of "high" the following is required to get php to work.{...}

• Type the following at the command prompt to ensure the mod_php3 rpm is installed on the machine:

rpm -qa | grep php3

If mod_php3-3.0.13-6mdk is listed, go to step 2. If NOT, then install the mod_php3 rpm by doing the following:

• put Mandrake 7.0 CD in CDROM
• type:

  mount /mnt/cdrom

• type:

  cd /mnt/cdrom/Mandrake/RPMS

• type:

  rpm -i mod_php3-3.0.13-6mdk

• Add the lines with the ** in front of them to the '/etc/httpd/conf/httpd.conf' file. I will put the line before the change to help insure you put the lines in the correct place:

~LoadModule setenvif_module modules/mod_setenvif.so<br> ~**~LoadModule php3_module /usr/lib/apache/libphp3.so<br> ~AddModule mod_setenvif.c<br> ~**~AddModule mod_php3.c<br> Include conf/vhosts/vhost0.conf<br> ~**Include conf/addon-modules/mod_php3.conf

• Restart the web server by typing:

/etc/rc.d/init.d/httpd restart

• You should see

Shutting down http: &#123; OK &#125;<br> Starting httpd: &#123; OK &#125;

Yves Lucet adds:

"To use php on apache I had to add the following lines to '/etc/httpd/conf/httpd.conf' (I am using Linux Mandrake 7.1):

#see http://www.mandrakeuser.org/troubles/tquick4.html<br> Include conf/addon-modules/mod_perl.conf<br> <br> ~LoadModule php3_module modules/libphp3.so<br> ~AddModule mod_php3.c<br> Include conf/addon-modules/mod_php3.conf

So the quick tip should be completed by checking that mod_perl is available, if it is not add the first Include line before loading php3."

section index

{= 7.0} "No more processes at this runlevel" during boot

(Contributed by Al Chou, edited)

"I ran

/etc/security/msec/init.sh custom

yes

No more processes at this runlevel

{...} Over the weekend I remedied this by reinstalling from scratch (I didn't know any better), but at an early point I did discover that /etc/inittab had zero bytes in it.{...}

I finally gleaned enough from Deja and the Linux System Administrator's Guide to piece together what to do. Here it is:

• Upon booting, tell ~LiLo to use

  linux init=/bin/sh

  .
• The file system will be mounted read-only, so remount it in read-write mode:

  mount -o remount,rw /dev/hda6 /

• Now restore your '/etc/inittab' from the backup copy (assuming here you have one called '/etc/inittab.bak'):
  

  cd /etc<br> cp inittab.bak inittab

• CTRL-ALT-DEL to reboot the system, which should come up normally.

section index

{-> 7.1} GNU/Linux doesn't detect more than 64 MB of RAM

If you've got MS-Windows installed, check if it detects the correct amount of system memory. If not, there is something wrong with your memory modules.
Current GNU/Linux kernels have some difficulties with certain BIOS'es, read this message from the linux-kernel mailing list for an explanation.
The only switch that might help you is supplying the correct amount of RAM either on the boot prompt or via '/etc/lilo.conf'. At the boot prompt, type

linux mem={size in MB}M

linux mem=96M

If this works, add it to your '/etc/lilo.conf', by changing the string

append=""

append="mem=96M"

title linux<br> kernel (hd0,0)/boot/vmlinuz root=/dev/hda1 mem=128M

section index

{-> 7.1} Acrobat Reader Crashes (Segfault)

Make sure you have version 4.05. But even that version crashes when used at a color depth of 24bpp. Either use 'xpdf' for displaying PDF files or change the color depth of your display.

section index

{= 7.1} ISDN doesn't work

Due to a packaging error, the 'isdn4k-utils' package in LM 7.1 does not install correctly. Either use the package from 7.0 or get the updated package (isdn4k-utils-3.1b7-6mdk), e.g. via the RPM Repository.

section index

Next Item: Next page of Quick Hacks

Related Resources:

Mandrake-Linux Bug-Tracker
Mandrake Linux Update and Security Advisories

Modified: Nov. 02, 2000
Author: Tom Berger

Legal: This page is covered by the GNU Free Documentation License. Standard disclaimers of warranty apply. Copyright LSTB and Mandrakesoft.