Audio in not working on Fedora


Alsa, PulseAudio

Audio is not working on Fedora Gnome and system settings does not list soundcards.
aplay -l
aplay -L
if does not provide output

sudo aplay -l
sudo aplay -L
sudo alsa-info

Shared USB with persistent accecc rights

Win XP

Shared USB disk access rights do not survive reboot or disk restart when shared normal way and right providing takes much time when disk contains many files.

Xlib: PuTTY X11 proxy: MIT-MAGIC-COOKIE-1 data did not match



Q: Executing a XWindows application fails and system logs:

Xlib: connection to "localhost:10.0" refused by server
Xlib: PuTTY X11 proxy: MIT-MAGIC-COOKIE-1 data did not match
Error: Can't open display: localhost:10

Visual Query cannot execute query to dBase


Microsoft ODBC dBase driver

There was persistent error "Invalid..." when try execute SQL query using Microsoft ODBC driver to dBase table named "xxstat_w.dbf". The queries to other tables work OK. Problem causes underscore in file name. (but filename "xxstat_w.dbf" is OK).

Odemknutí tabulky v Excelu


MS Excel


The code below can unlock a workbook password and sheet passwords. To use it, copy it to a new general code module.

Boot diskette preparation



Rescue linux diskette is possible whenever to prepare using:

mkbootdisk --device /dev/fd1 2.2.14-5.0

where version is directory /lib/modules/2.2.14-5.

How to disable “Restart Now” Message from Windows Update




After automatic update, that could be even unwanted, Windows periodically blasts message forcing restart. It could be extremly annoying when you processing an uninterruptable task. This message may be disabled very easily, just stop service called "wuauserv", i.e.

Czech sorting installation




Correct czech sorting (included "ch") in mySQL is set using --default-character-set=czech directive on mysqld daemon command line, e.g. in /etc/rc.d/init.d/mysql file. After restarting was impossible connect to server. Problem is in changed code page - old indexes were created with different code page. Solution: recreate whole database:
  1. export data, mysqldump --all-databases --add-drop-table > /tmp/mydump.dmp
  2. import data, mysql < /tmp/mydump.dmp

error "Could not find installable ISAM" when accessing database

Win 98

Form Filler


After some installation (MS Office2000 ?) it was impossible to connect to database table using ISAM. There was installed on computer MS Jet 3.5 a 4.0 and DAO 3.5 a DAO 3.6. If is not necessary usage of DAO3.6 delete file /Common files/Microsoft Shared/DAO/dao360.dll. Now it works.

Resetting of printed page counter

Hawlett Packard


HP printer watches number of printed pages since last technical inspection. If count exceeds 20000 then displays message "Call HP ...". To reset counter:
  1. switch off the printer