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1.  In order to fully update your guest system, open a terminal and run

    yum update

as root.

2. Install the GNU C compiler and the kernel development packages using

    yum install gcc

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File & Directory chmod value:
1) stat --format '%a' <file/directory>
2) stat -c %a <file/directory>


File & Directory Sizes:
du -sh *

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sudo add-apt-repository ppa:michael-gruz/canon-trunk
sudo apt-get update
sudo apt-get install cnijfilter-common
sudo apt-get install cnijfilter-mg5200series

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These steps have worked with Ubuntu 14.04, Kubuntu 14.04 and Lubuntu 14.04

1) # sudo apt-get update

2) # sudo apt-get upgrade

3) # sudo apt-get install linux-headers-generic

4) # sudo apt-get install build-essential dkms

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1) Download cntlm rpm package from http://sourceforge.net/projects/cntlm/files/cntlm/

2) Login as root

3) Run command:
    $ rpm -ivh cntlm-*.rpm

4a) Obtain password hash for the configuration file in step 4b (do not put plaintext password in configuration)
    $ cntlm -H -d <domain> -u <username>

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Ubuntu:

1) wget https://opscode-omnibus-packages.s3.amazonaws.com/ubuntu/12.04/x86_64/chef-server_11.1.3-1_amd64.deb
2) dpkg -i chef-server*.deb
3) sudo chef-server-ctl reconfigure
4) sudo chef-server-ctl test


CentOS:

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exec su - <username>

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System -> Preferences -> Keyboard

Under Layouts tab, choose the appropriate Keyboard model

Click 'Layout Options...' button

Expand Alt/Win key behavior

Choose "Control is mapped to Win keys (and the usual Ctrl keys)

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  A CA file has been bootstrapped using certificates from the system
keychain. To add additional certificates, place .pem files in
  /usr/local/etc/openssl/certs

and run
  /usr/local/opt/openssl/bin/c_rehash

This formula is keg-only, which means it was not symlinked into /usr/local.

Mac OS X already provides this software and installing another version in

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If builds of PostgreSQL 9 are failing and you have version 8.x installed,
you may need to remove the previous version first. See:
  https://github.com/Homebrew/homebrew/issues/2510

To migrate existing data from a previous major version (pre-9.4) of PostgreSQL, see:
  https://www.postgresql.org/docs/9.4/static/upgrading.html

To have launchd start postgresql at login:
    ln -sfv /usr/local/opt/postgresql/*.plist ~/Library/LaunchAgents
Then to load postgresql now: