Tips and Tricks

From MyWiki

Contents 1 Slowing down the BIOS Screen in VMware 2 Locating Recently Modified Files 3 Highlighting Text in HTML 4 Extract a Single File from an RPM 5 How to Simulate a Slow Network

Slowing down the BIOS Screen in VMware

In the vmx file:

bios.bootDelay = "boot delay in milliseconds"

Locating Recently Modified Files

To locate files that have been modified since some arbitrary date use this little trick:

 $ touch -d "13 may 2001 17:54:19" date_marker
 $ find . -newer date_marker

Highlighting Text in HTML

<span style="BACKGROUND-COLOR: #ffff00">

blah blah

</span>

Extract a Single File from an RPM

rpm2cpio /root/ntp-4.2.4p5-2.fc9.x86_64.rpm | cpio -ivd ./etc/ntp.conf

How to Simulate a Slow Network

Use traffic control (tc), part of the iproute rpm.

To display:

# tc qdisc show
qdisc pfifo_fast 0: dev eth0 bands 3 priomap  1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1

To add:

# tc qdisc change dev lo root netem delay 950ms   <--localhost 
# tc qdisc change dev eth0 root netem delay 950ms

To remove:

# tc qdisc del dev lo root   <--localhost
# tc qdisc del dev eth0 root

Useful Links

• http://www.linuxfoundation.org/en/Net:Netem