Skip to main content

Useful Linux Commands - IV

  1. who : gets all the connections made to your account
  2. netstat –antp : to know all the process running on ports
  3. sudo /etc/init.d/network restart : restart networking on your linux box
  4. Understanding the init.d Directory – This directory has the control scripts for most of the services on our linux box. The start/stop/restart/reload/force-reload options can be used with any command found under this directory
    1. Most common Services controllable from this directory are: apache2, sshd, networking, ftpd, samba, mysql
    2. You can run any command using the following format: sudo /etc/init.d/<command> <option>
      1. where command can be apache2, sshd, networking etc
      2. and option can be start, stop, restart etc
    3. For ex: sudo /etc/init.d/networking restart Smile Simple!
  5. Refresh DNS Cache
    1. Ping your linux box using “ping <your_computer_name>” – Note down the IP Address shown
    2. Look at the contents of ifconfig file using “sudo /sbin/ifconfig” – Read the part labeled as inet addr:
    3. The two values noted down in step 1 and 2 should match. If they don’t then it means your DNS Cache is stale.
    4. Refresh the DNS Cache using “sudo /etc/init.d/nscd restart
  6. uptime : This command tells you the current time, length of time the host has been running, numbers of users currently logged on, and the load averages for the past 1, 5, and 15 minutes.


Popular posts from this blog

wget error–“zsh: parse error near &”

There is no doubt that I prefer wget way over any other type of downloads…Syntax: wget <DOWNLOAD_URL>If you get this error “zsh: parse error near &” then its probably because your download URL has a “&” so you should try giving your DOWNLOAD_URL in double quoteswget “<DOWNLOAD_URL>”If you are trying to download from a site which needs you to give your credentials then you can try giving it this waywget --http-user=<UserName> --http-password=<Password> “<DOWNLOAD_URL>”Hope this helps

How to check if my xpath is valid using firebug?

Yes, you can verify if your xpath is pointing to the right source on the web application under test using FireBug. Here is how: 

Go to the Web Application under test We'll take Google for simplicity reasons
Open FireBug - Go to the Console Console can also be seen at the bottom of the page, so don't worry they both are the same. They can be switched as follows: 

Type in $x("Your xpath here") on the command line prompt as shown below:

Hit Enter/RunYou will get to see the element which was filtered out with your XPath expression

How to Unpack a tar file on Windows?

On Windows:
You can download a simple command line tool to do this.
You can download the tool from here Usage can be found on the website but pasting it here too for convenience: C:\>TarTool.exe
Usage :
C:\>TarTool.exe sourceFile destinationDirectory
C:\>TarTool.exe D:\sample.tar.gz ./
C:\>TarTool.exe sample.tgz temp
C:\>TarTool.exe -x sample.tar temp
TarTool 2.0 Beta supports bzip2 decompression for files with extensions like tar.bz2 and .bz2.
TarTool -xj sample.tar.bz2 temp
TarTool -j sample.bz2
Download TarTool 2.0 Beta from here
Unpack a .txz file on Windows
Use the 7zip tool to unpack a .txz file on windows

On Linux:
You can use the bzip2 and tar combined to do this…
for ex: bzip2 –cd <tar.bz_fileName> | tar –xvf -
This will unpack the contents of the file

Happy Un-Tar-ing