Unix shell commands

1. Find all files in home dir with size greater than and of certain type, finally copy them to usb flash drive (on Mac OS X):
find ~ -iname '*.tiff' -size +1M -exec cp {} /Volumes/flashka/tiff/ \;

On Max OS X to preserve directory structure use pax command:
find ~ -iname '*.tiff' -size +1M -exec pax -rw {} /Volumes/flashka/tiff/ \;

Nginx and VirtualBox shared folders

Thanks to the "Geek" i've finally figured out how to operate with vboxsf on nginx.
Just turn off sendfile directive in nginx.conf.

http://smotko.si/nginx-static-file-problem/

UBUNTU. Check version of package

In order to check the version of a package (either installed or in repository):

apt-get install apt-show-versions


apt-show-versions -a <package>

Ubuntu on Acer R3700 nettop can't shutdown/reboot

Seems like at least one module needs to be disabled from config.

lsmod | grep rt

Find out if there exists rt2800pci .

sudo modprobe -rf rt2800pci

echo blacklist rt2800pci | sudo tee -a /etc/modprobe.d/blacklist.conf

Tested on XFCE 11.04

UBUNTU: change hostname

To view current hostname:
sysctl kernel.hostname

To change it:
 sysctl kernel.hostname=NewHostname

Or better edit /etc/hostname

Also don't forget to edit /etc/hosts to prevent sudo showing stupid "unable to resolve" error.

Ubuntu Linux: slow login to SSH server

The solution is rather simple:

sudo echo "UseDNS no" >> /etc/ssh/sshd_config

Ubuntu Linux: Uninstall / Remove Any Installed Software

Uninstall / Delete / Remove Package

Just use the following syntax:

 sudo apt-get remove {package-name}

 For example remove package called mplayer, enter:
 $ sudo apt-get remove mplayer

Remove package called lighttpd along with all configuration files, enter:
 $ sudo apt-get --purge remove lighttpd


To list all installed package, enter:
dpkg --list
dpkg --list | less
dpkg --list | grep -i 'http'