Git: Removing Files and Directories

Removing a Single File

git rm path/to/your/file.txt

Removing Multiple Files

git rm path/to/your/file1.txt path/to/your/file2.txt

Removing a Directory

git rm -r path/to/your/directory

Removing Files Only from the Index (Not the Working Directory)

git rm --cached path/to/your/file.txt

Removing All Files with a Specific Pattern

git rm path/to/your/*.txt

Committing the Changes

git commit -m "Remove unwanted files"

Example

1. Remove a file:

   git rm src/old_code.py

2. Remove a directory:

   git rm -r docs/obsolete

3. Commit the changes:

   git commit -m "Remove old files and obsolete documentation"

SOA Record vs NS Record

Despite the fact that both records are mandatory for the normal work of your zones, their roles are quite different.

Summary of SOA and NS Records:

1. SOA Record (Start of Authority):

Purpose: The SOA record provides essential information about the DNS zone, such as the primary name server, the administrator's email address, and important timers like the refresh rate, retry rate, and expire time. It is automatically created when a DNS zone is set up.

Components:

• Serial Number: Indicates the version of the DNS zone. It is incremented whenever changes are made.
• Primary NS: The main name server for the DNS zone.
• DNS Admin Email: The email address of the administrator responsible for the zone.
• Refresh Rate: How often secondary name servers check for updates.
• Retry Rate: How often secondary servers retry after a failed attempt to check for updates.
• Expire Time: The time after which secondary servers stop responding if they can't reach the primary server.
• TTL (Time to Live): How long the information is cached.

2. NS Record (Name Server):

Purpose: The NS record specifies the authoritative name servers for a domain, meaning it points to the servers responsible for the DNS zone. These are the servers that hold the DNS records for the domain and respond to queries.

Components:

• Host: The domain name.
• Type: Typically "NS" for name server.
• Points to: The address of the name server.
• TTL: The time the record is cached before it should be refreshed.

Checking SOA Record:

Windows: Use the nslookup command:

nslookup -q=soa example.com

Linux/macOS: Use the dig command:

dig example.com soa

Online Tool: Use ClouDNS Free DNS tool to check SOA records.

These commands ensure that the specified files and directories are removed from your Git repository in a controlled and traceable manner.