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How to get uptime in Windows using PowerShell

If you need to monitor how long the machine has been up, or whether the machine rebooted by itself or someone has just rebooted the server for without any reason. Then getting the uptime of the machine or server is important.
PowerShell code below gets the uptime by using a command line and processing its output.
#==========================
#get the uptime and save to text file Invoke-command -ScriptBlock { net statistics server >c:\online.txt }  $xcmd = select-string -path "c:\online.txt" -Pattern "since" | select line |ft -hidetableheaders  write-output $xcmd | out-file c:\online1.txt  $stry = get-content c:\online1.txt | out-string  $concatString = $stry.Substring(18,15) Write-host  $concatString
#Get the date $StartDate= [datetime] $concatString $EndDate= (GET-DATE) $xdate = NEW-TIMESPAN –Start $StartDate –End $EndDate write-output $xdate #==========================
Sample output:
Days              : 3 Hours             : 12 Minutes           : 12 Seconds           : 17 …

PowerShell registry keys basic operation

Working with registry keys is good and bad.
Good if you know exactly what you are doing, bad if you are just experimenting and you mess up the entire system.
Anyway, virtual machines will always save the day during test or experiment stage. Once everything is okay then deploy to the actual or production environment. If the test goes haywire, just trash the VM and start all over again.
Below are just simple and basic commands in PowerShell to query or get data from the registry.
This command below will list all the software listed on HKCU\Software path.
Get-ChildItem -Path HKCU:\Software
It’s quite useful to run it sometimes, so you will know what software is inside your system.
Below will list the user shell folders on the system.
Get-itemproperty 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders'
Sample output:
AppData                                : C:\Users\Administrator\AppData\Roaming Local AppData                          : C:\Users\Administrator\A…

Linux list folders recursively

To list all folders on the root directory, type:
  ls -d /*
Sample Output:
/bin     /dev   /smsbackup  /lost+found  /mnt  /proc  /selinux  /tmp /boot    /etc   /lib        /media       /net  /root  /srv      /usr /cgroup  /home  /lib64      /misc        /opt  /sbin  /sys      /var
To list all folders on the current folder, one level depth only; type:
[xxx@mx var]$ ls -d */
Sample Output:
account/  cvs/    games/  local/  lost+found/  opt/       spool/  yp/ cache/    db/     gdm/    lock/  sms/        preserve/  tmp/ crash/    empty/  lib/    log/    nis/         run/       www/

List all folders and sub folders, 2 level depth or 2 level hierarchy; type:
[xxx@mx var]$ ls -d */*/
Sample Output:
cache/abrt-di/        lib/misc/        log/ConsoleKit/      run/portreserve/ cache/cups/           lib/mlocate/     log/cups/            run/rhsm/ cache/fontconfig/     lib/net-snmp/    log/sms/            run/saslauthd/ cache/foomatic/       lib/nfs/         log/gdm/             run/sepermit/ cache…

Access denied renaming shared folder

If you are working in a shared active directory environment and has a shared folder that needs to be renamed once in a while.
But every time you want to rename there is always a user who is using the folder and therefore, renaming the folder is denied.
How to rename the folder when the shared folder is always in use?
Automation will come for the rescue in such a scenario.
How to automate renaming the folder?
Task scheduler and a simple batch file can do the task and a life saver.
Here's how to do it:
Of course, disconnect all the open files. Users should shutdown their computers when they went out of the office,
If they don't shutdown, force their disconnection by using the command below:
openfiles /disconnect /o read/write openfiles /disconnect /o no access
Then, rename the folder with the ren or rename command of course.
Syntax is the good old fashioned source folder or path and the new folder name.
If the batch file will be run directly on the server, then the drive letter w…

Use tar command to backup in Linux

tar or tape archive is a basic tool that every Linux user should know.

Its syntax is quite different from the traditional copy or move command.

Since tar works from a 'current working directory' perspective.

Traditional syntax for copy or move is source then the destination.

In tar, the syntax is the filename or the path where the backup will be save and the source or the folder to be backed up or archived.

Typing: man tar (at the terminal shows the following)

tar -cf archive.tar foo bar
# Create archive.tar from files foo and bar.

Basically, it's like the destination where the file will be saved and the source or the files that will be archived.

Here's a simple bash script that will append the time and date the tar file was executed to the filename of the tar file.

If the bash script is automated via cron, the filename of the tar file will include the date and time the cron executes the script.


#script begins

#!/bin/bash
NOW=$(date +%Y%m%d%H%M)
echo $NOW
tar -Pczvf   /mnt/o…

PowerShell get folder capacity

Get the folder capacity using PowerShell via the old-school method.
Old-school since we will utilize the native “dir” command, just like the good old days of DOS.
PowerShell dir command output is not the same with the native windows system32 dir command line just like in DOS system.
The output will be in bytes since it is from the command line but of course, if you are command line junkie it will be easy to read even if the capacity is written in bytes.
First, fire up notepad write the dir command plus the full folder path of the specified folder in which you like to monitor or want to know the capacity.
 dir “c:\users\dmusic\music folder 001”
The path is enclosed in quotes since the folder has spaces and save the notepad as a batch file with “.bat” extension.
Open PowerShell command line window or PowerShell ISE and type the following command:
#change the path to where the batch file was saved
$folder_base_cap = d:\read_folder_cap.bat 
$ folder_base_cap | Select-String "bytes&qu…

PowerShell disable USB ports

Disabling USB ports using PowerShell by modifying registry values.
How to user PowerShell to modify an existing value in Windows Registry?
PowerShell code below modifies the registry value and disable USB ports in Windows.
The code must be run in an elevated mode to modify the registry.
Here's the code:
Modify the registry key value using PowerShell:
Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\USBSTOR\" -Name "start" -Value 4
To enable the USB ports, change the value to 3:
Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\USBSTOR\" -Name "start" -Value 3
Disabling USB ports is quite annoying of course, but if security is a concern then I guess it is justifiable especially computers that can easily be accessed by unwanted guests or individuals.

It will also protect the network or computers from getting malware's or viruses that is transferred or copied via USB storage.



Cheers! Till next time.


==============…

IOT – what is it about?

IOT –  an acronym for Internet of things.
What is IOT? What is it about? What does it do?
IOT composes of two components, Internet and things.
So, what are the things? Things are smart phone, Arduino, Beagle bone, Raspberry Pi, Smart TV’s, Refrigerators, air-condition system or basically any devices or appliances that are capable to be connected to the network or to the Internet.
If those thing, devices or appliances is not connected to the network or internet they are just on their own. They are just things of the people who owned them.
But once they are connected to the Internet and are controlled remotely, then it becomes an IOT the Internet of Things, since they are already part of a larger network. In which, some software or individuals can access to the things remotely.
IOT is a good thing but there will always be individuals who will abuse or do evil things. IOT devices or appliances should be safe and secure. But things are hackable and I guess it will just be a matter of time befo…

Bash check if folder exists

Simple bash script for beginners trying to get their hands wet on bash scripting.
The code below will ask for input and the input should be a string or a folder name.
The script will just do a basic ls and if the folder name is found it will show “The folder is found” or else the next echo statement is displayed.
Instead of simply displaying an echo command a function or another script can be called to execute a process further.
#!/bin/bash # This script will ask for a string or folder name and check whether it is present or not
echo "Enter folder name, followed by [ENTER]:"
read folder_name
ls | grep ^$folder_name && echo "The folder is found" || echo "The folder cannot be found" #Script ends
It’s a one liner evaluation, some sort an if then else in other programming languages, the && statement is executed if the evaluation is true, and if the evaluation is false the || is executed.
The read folder_name line, is the statement that will hold the inp…

Excel VBA set worksheet visibility

Set excel worksheet visibility by changing its property.
Simple and a one liner code to hide and unhide worksheet in Excel.
Sub Visible_Sheet()
Worksheets(1).Visible = 1  'Make the worksheet visible
End Sub
Sub Hide_RightClick_Unhide()
Worksheets(1).Visible = 0    'Hide Worksheet to Unhide Right click on Sheet name and unhide the worksheet
End Sub
Sub Super_Hide()
Worksheets("calcx").Visible = 2
 'Hide Worksheet but right click on Sheet name will not show whether the sheet is hidden or not
End Sub



Cheers! Till next time.

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