How to change the Linux prompt

Posted on November 10, 2015 by Ahmed Tawfik

Sometimes the Linux prompt doesn’t look really attractive and/or practical, like for example bash:/ or sh:/ which is really annoying.

To solve this, you need to use the PS1 environment variable and append to it what you need:

  1. Go to your home directory and create a .profile file
  2. edit the .profile file and add the following: “PS1=’$USER@$HOSTNAME $PWD \$ ‘”, this will give you something like: “john@myserver /home/john: “

Source

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How to add Ubuntu Server to a Windows Active Directory

Posted on November 10, 2015 by Ahmed Tawfik

Setup:

Server: Ubuntu 14.04.3 LTS 64-bit

pbis-open version: 8.3

First of all, install these packages:

  1. libpam-winbind (available in repository)
  2. nfs-common (available in repository)
  3. pbis-open (download latest version from http://download1.beyondtrust.com/Technical-Support/Downloads/PowerBroker-Identity-Services-Open-Edition/?Pass=True)

Now that you have all the necessary packages, you have to start the setup:

  1. “sudo pam-auth-update” (use –force option in case you have done some local modifications before, but take care that it will reset all your old settings and place them in a .old file)
  2. “sudo domainjoin-cli join DOMAIN_NAME DOMAIN_USERNAME“
  3. Enter the password, then you should receive a SUCCESS message
  4. Reboot the server

Now you have joined the Active Directory!All what’s remaining now is allowing a group to have sudo access if needed:

  1. Edit the “/etc/sudoers” file
  2. In the line below “%admin ALL=(ALL) ALL”, add the following: “%DOMAIN_NAME\\DOMAIN_GROUP ALL=(ALL) ALL” (without the quotes)

That’s it! Now your user is a sudoer and you can login to the machine using “ssh DOMAIN_NAME\\DOMAIN_USERNAME@SERVER_NAME”

Optional: If you wish Bash becomes the default shell for the user, just execute the following command “sudo  /opt/pbis/bin/config LoginShellTemplate /bin/bash”

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How to install vmware-tools and use shared folders on an Ubuntu VM inside VMWare Workstation 12 Pro

Posted on November 8, 2015 by Ahmed Tawfik

Although when you I tried to enable the guest additions using the suggested open-vm-tools, it doesn’t run correctly and I’ve been unable to use shared folders between the host and guest in order to copy some files.

I accordingly used the legacy vmware-tools, and voila! everything worked fine!

My Setup:

  • Host: Ubuntu 15.10 (Wily)
  • Guest: Ubuntu 14.04.3 LTS Server
  • Hypervisor: VMWare Workstation 12 Pro

Prerequisites:

  1. Install the following packages: build-essential, linux-image-virtual, linux-headers-virtual
  2. create a directory /mnt/hgfs
  3. Right-click the settings on the VM -> Options -> Shared Folders and enable Folder Sharing and add a folder to be shared between the host & guest

Install the VMWare Tools:

  1. start the VM, then from the top menu click VM -> Install VMWare Tools. This should attach the VMWare Tools CD to the VM
  2. Mount the VMWare Tools CD: “sudo mount /dev/cdrom /media/username/cdrom”
  3. copy the “VMware-Tools-xxxx” to any folder and extract it
  4. Navigate to the created folder: “cd vmware-tools-distrib” and install: “sudo ./vmware-install.pl”
  5. Accept all the defaults
  6. Reboot!

Mount the shared folder:

  1. “sudo mount -t vmhgfs .host:/ /mnt/hgfs”

That’s it! Enjoy!

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Getting VMWare Workstation 12 Pro to work on Ubuntu Wily (15.10)

Posted on November 7, 2015 by Ahmed Tawfik

Just add this line to the  “/usr/bin/vmware” file:

export LD_LIBRARY_PATH=/usr/lib/vmware/lib/libglibmm-2.4.so.1/:$LD_LIBRARY_PATH

immediately after the “export PRODUCT_NAME bla bla bla” line.

That’s it! Enjoy!

Source: http://askubuntu.com/questions/689123/vmware-wont-work-after-ubuntu-upgrade

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Setting the CPU Governor to Performance on Ubuntu Wily (15.10)

Posted on November 3, 2015 by Ahmed Tawfik

Hi,

I prefer to always set the CPU to the performance governor as it always boosts my computer’s performance:

Update: The kernel module loaded by default that controls the cpu frequency in Ubuntu Wily’s kernel is “linux_pstate”. You have to disable it before applying the steps in the next section. You can do this by modifying “/etc/default/grub” and adding “intel_pstate=false” parameter to the “GRUB_CMDLINE_LINUX_DEFAULT” line, it should look like this:

GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash intel_pstate=disable”

save the file, then run “sudo update-grub”

Reboot, then do the steps below:

  1. Install the cpufrequtils package: “sudo apt-get install cpufrequtils”
  2. Edit the “/etc/init.d/cpufrequtils” file and set the following line to the governor you need (performance in my case): “GOVERNOR=”performance””
  3. Save the file and exit
  4. Reboot

That’s it! Enjoy!

Reference

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