Linux command: du - disk usage

Where have all my storage gone? du summarize disk usage of the set of FILEs, recursively for directories.

du -sh : summary, human readable format (B,KB,MB,GB)
du -d 1 : 1 depth level

du / -h -d 1

/: root directory
h: Display in human format K M G
d: --max-depth is 1 (one) level

Take a look at /usr and /var directories

du /usr -h -d 1
du /var -h -d 1

df -h

>>> THM | Linux Modules - Task 2

>>> Disk Usage on Windows

Powershell: Enable Firewall Log

We sometimes need to enable Windows firewall's log to troubleshoot. Here is how.

MSSQL: Fix error 'Consistency validation for SQL Server registry keys'

While installing Microsof SQL Server 2012, I ran into the following error. "The SQL Server registry keys from a prior installation cannot be modified. To continue, see SQL Server Setup documentation about how to fix registry keys." How to fix Replace the D:\x64\FixSqlRegistryKey_x86.exe file with the original file from the ENU\SQLFULL_ENU.iso file downloading from Microsoft Download Center. This ISO file is 4.2GB. So you can click FixSqlRegistryKey_x86.exe to download this file only. After replacing that file, press Re-run to check. All rules are passed.

Linux command: ssh-keygen - Generate SSH Keys

ssh-keygen — authentication key generation, management and conversion

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