fix readme for the new ubuntu version

Author: istvano

README.md

@@ -111,35 +111,25 @@ By default these commands will resize the partition to the available maximum
 or use gparted to resize the partition using the gui
 
 * resize - check the /dev/sdax before executing the commands
-`sudo pvresize /dev/sda1` 
-
-or 
-
-`sudo pvresize /dev/sda5`
+`sudo pvresize /dev/sda3` 
 
 * show volume names and display sized
 `sudo lvdisplay`
 `sudo vgdisplay`
 
 * extend lvm root partition to maximum
-`sudo lvextend -l +100%FREE /dev/vagrant-vg/root`
-
-or 
-
-`sudo lvextend -l +100%FREE /dev/vgvagrant/root`
+`sudo lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv`
 
 * resize filesystem to to the partition size
-`sudo resize2fs /dev/vagrant-vg/root`
-
-or 
-
-`sudo resize2fs /dev/vgvagrant/root`
+`sudo resize2fs /dev/ubuntu-vg/ubuntu-lv`
 
 * reboot
 
 ## Docker dns issue
 
-Add or edit sudo vim /etc/docker/daemon.json
+Add or edit 
+
+`sudo vim /etc/docker/daemon.json`
 {
   "dns": ["1.1.1.1","1.0.0.1"]
 }
@@ -220,7 +210,7 @@ sudo apt-get install peek
 sudo apt install font-manager
 ```
 
-* edit this to handle the error message eval "$(pipenv --completion)"
+* in case of python command completition error message. edit this to handle the error message eval "$(pipenv --completion)"
 ```bash
 vim /home/vagrant/.antigen/bundles/gantsign/zsh-plugins/pipenv/pipenv.plugin.zsh
 ```