alexandrinos

#Linux Tar usefull  commands
#-x extract -z typecompression(gz) -v verbose -f use the following tar achive
tar -xzvf tarfile.tar.gz  #for tar.bz2 or bzip use -xjvf tar.bz2
#extract to specific path -C path
tar -xzvf tarfile.tar.gz -C /mypath
#extract a single file ; just add the name of the file and the path after the command
tar -xzv -f file.tar.gz "./new/abc.text"
#extract multiple files
tar -xzv -f file.tar.gz "./new/abc.text" "./new/xyz.txt"
#extract multiple files using *

alexandrinos

#from 
#       https://www.youtube.com/watch?v=LQSMJtckzYI
#  simple chat coomunication between 2 machines with netcat 
#This works with linux, Win
# to install apt-get install netcat-traditional #buntu
#IP 192.168.33.10
nc 192.168.33.10 3137
#IP 192.168.33.11 ; so this machine is listening on the ß0rt 3137 for what 192.168.33.10 is sending, and vicevers
nc -l -p 3137

alexandrinos

# 
ssh -l vagrant -i /home/glasslab/.vagrant.d/insecure_private_key 127.0.0.1 -p 2222

alexandrinos

#show all rules in a table ; you can use alternatively -L
sudo iptables -S
#show rule number in each of the 3 possible cases: INPUT OUTPUT FORWARD
sudo iptables -L --line-numbers
#delete a rule with a number; syntax: iptables -D <OUTPUT|INPUT|FORWARD> <line_number>
sudo iptables -D OUTPUT 3
#delete all rules in a chain ;chain= INPUT, OUTPUT or FORWARD
sudo iptables -F INPUT  
#

alexandrinos

#show language
locale
#change keyboard quickly
loadkeys de
#for X
setxkbmap de
#system wide, if ubuntu
sudo dpkg-reconfigure console-setup
#toggle us de
setxkbmap -option grp:alt_shift_toggle us,de

alexandrinos

Function Get-EnabledRules
{
    Param($profile)
    $rules = (New-Object -comObject HNetCfg.FwPolicy2).rules
    $rules = $rules | where-object {$_.Enabled -eq $true}
    $rules = $rules | where-object {$_.Profiles -bAND $profile}
    $rules
}

$networkListManager = [Activator]::CreateInstance([Type]::GetTypeFromCLSID([Guid]"{DCB00C01-570F-4A9B-8D69-199FDBA5723B}"))

alexandrinos

Difference between Home,Work,Public is about SHARING policy.
              Public to be used when using a public Internet connection, for example

"Public" Network Profile: -more secure
                          -  turn off sharing and not allow others to see your computer
"Home" Network- win7 network.Mixed XP,Linux or Max could be dangerous
              -like an open network, joined by a SINGLE password and supports media sharing
"Work" Network- is XP style file sharing- with username and pass to connect to other comps
              -is safe because is controlled by user account and share permissions, for example
              in mixed OSs cases.

alexandrinos

sudo apt-get update
sudo apt-get install samba
#we need a different username and password for sambaserver
#for convenience, the user and passsword could be same as the username we are logged in linux
sudo smbpasswd -a <user_name>
#optional if the user is not the owner of the folder
#if apache and the user has is not owner(usually root) we need to chmod  with and chown
#sudo chmod 2775 /var/www -R
#sudo chown root:<user_name> /var/www
sudo chown <user_name> /var/opt/folder

alexandrinos

#  ------------------ NETSH ---------------
#
#for help: $ netsh /?



#NETSTAT
#
#usefull
netstat -bn 

alexandrinos

#see https://help.ubuntu.com/community/SSH/OpenSSH/Keys
#add a public key to the authorized_keys on the server, if authorized_keys already exist on the server
cat ~/.ssh/id_rsa.pub | ssh user@machine "mkdir ~/.ssh; cat >> ~/.ssh/authorized_keys"
#add a public key to the authorized_keys on the server, if authorized_keys not exist
cat ~/.ssh/id_rsa.pub | ssh user@machine "mkdir ~/.ssh; cat >> ~/.ssh/authorized_keys"
#ssh-copy-id doesn't work here on Ubuntu with Myngw64 Win7
#use extended variant,for permissions issues
host=user@]machine;
ssh $host 'mkdir -pm 700 ~/.ssh; echo ' $key ' >> ~/.ssh/authorized_keys ; chmod 600 ~/.ssh/authorized_keys'