Technical support Linux | Linux/Windows | Windows | HTML | VMWare | Scripts

Text with a white background will vary between users and systems.

Text in a Courier/Serif-type font is to be typed at a terminal/command prompt.

Text inside [square brackets] is optional to the command and can be ignored or changed.

"example.net" is a fictitious domain.

VMware

Remote/automated installation

Kickstart for Fedora and RedHat Linux

Remote Installation Service: RIS for Windows

Guide to setting up Fedora Core 5

Oracle, Windows, Linux (bash) and OSX commands.

Linux quick reference (pdf format). Thanks to Jialong He.

ifcfg syntax

vi reference

VNC reference: part I, part II

SSL on Apache

LVM howto

How to implement "security = domain" on a Samba server

GUI/X

To start the GUI:

init 5

To stop the GUI:

init 3

To restart the GUI (from within):

Press <Ctrl>+<Alt>+<Backspace>

To set whether the GUI starts at system start-up:

vi /etc/inittab

• id:5:initdefault: = gui
• id:3:initdefault: = no gui

DVD/CD writing

To make the .iso image:

mkisofs -J -R -r -V cdname -iso-level 3 -joliet-long -o isoname.iso /path/

To detect the writer device:

cdrecord -scanbus

To write the .iso image to the disk choose one of:

growisofs -dvd-compat -Z /dev/hdc isoname.iso

cdrecord dev=0,0,0 -eject driveropts=burnfree -v isoname.iso

dvdrecord dev=0,0,0 -eject driveropts=burnfree -v -[tao|dao] isoname.iso

growisofs -dvd-compat -use-the-force-luke=tty -Z /dev/hdc isoname.iso

Port tunneling

Linux

To connect to CHARLIE on port C from port A on the local computer using bravo@BRAVO as a gateway:

• ssh -fN -L A:CHARLIE:C bravo@BRAVO -N

e.g. Bob Smith is sitting at homepc wanting to connect to http://intranet using gateway.example.net as a gateway:

• ssh -fN -L 10000:intranet:80 bobsmith@gateway.example.net -N
• firefox http://localhost:10000

Windows/PuTTY

To connect to CHARLIE on port C from port A on the local computer using bravo@BRAVO as a gateway:
e.g. Bob Smith is sitting at homepc wanting to connect to http://intranet using gateway.example.net

Start PuTTY and connect to the gateway using ssh, e.g. gateway.example.net

• Right-click the system menu and choose Change Settings...
• Expand Connection | SSH | Tunnels

Configure the tunnel:

• Source port: A, e.g. 10000
• Destination: CHARLIE:C, e.g. intranet:80
• Optional: Click [Local ports accept connections from other hosts]
• Click Add | Apply

Check that the connection is working:

• firefox http://localhost:10000

Mount an smb/cifs share

mount -t smbfs -o [ro|rw,][uid=0,][dmask=700,]username=windowsusername[/windowsdomain] //windowscomputer/sharename /pathonlinuxcomputer/

mount -t cifs -o [ro|rw,][uid=500,][gid=500,]username=windowsusername[,domain=windowsdomain] //windowscomputer/sharename /pathonlinuxcomputer/

Various

Add options to autofs/automount:

Add OPTIONS="-O sec=sys" to /etc/init.d/autofs

To connect via COM1:

cu -l /dev/cua0 -s 9600

Find syntax

find /usr/share/bugzilla/ -name Group* -print

Synchronise files:

rsync -avz -e ssh sourcepath/ remoteuser@destinationremotehost:remotepath

Copy directories maintaining all file properties:

tar cvf - source | (cd destination && tar xvf -)

View directory sizes:

du -hsx *

View a process

strace -p process

HTML is often put in spam. It links to the website of the spammer and downloads images.
That lets the spammer know you've read their email.
You can disable this functionality in Outlook 2002 by following these instructions.

mailto: syntax

Spam-me-not email link obfuscator

HTMLify

PHP syntax checker

Special characters

.htaccess guide

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