🛠️ Vastool & 🧾 Grep

 🛠️ Vastool Cheatsheet

🔐 Authentication

bash

vastool kinit <username>           # Get a Kerberos TGT (ticket-granting ticket)
vastool kdestroy                            # Destroy current Kerberos tickets

👤 User Info

bash

vastool list users                                    # List all AD users visible to system
vastool user check <username>         # Check if user exists in AD
vastool user info <username>            # Detailed info about a user
vastool user get-attrs <username>     # Show LDAP attributes for user
vastool user is-locked <username>     # Check if user account is locked

👥 Group Info

bash

vastool list groups                                        # List all AD groups
vastool group info <groupname>             # Details about an AD group
vastool group members <groupname>    # List members of a group

🌐 Domain & Computer Info

bash

vastool info domain                   # Show domain joined info
vastool info joined                    # Show if machine is joined to AD
vastool status                            # Show AD Bridge service status

🔧 Join/Leave Domain

bash

vastool join <domain> <admin-user>    # Join domain (requires creds)
vastool unjoin -f                                           # Leave the AD domain

🔎 LDAP Search / Directory

bash

vastool search <basedn> <filter> [attrs]    # Raw LDAP search
vastool search -b "dc=example,dc=com" "(cn=*)" cn mail

🔐 Password & Locking

bash

vastool user reset-password <user>         # Reset user password
vastool user unlock <user>                       # Unlock AD account
vastool user disable <user>                     # Disable user
vastool user enable <user>                     # Enable user

📄 Other Useful Commands

bash

vastool schema list-classes                   # List AD schema classes
vastool attrs <object-DN>                  # View all attributes of an AD object
vastool daemon restart                      # Restart the AD Bridge daemon

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⚠️ Many vastool operations require root or appropriate sudo privileges.

💡 Use vastool with --help or man pages (man vastool) to explore more.

🧾 Grep Command Cheatsheet

🔍 Basic Usage

bash

grep "pattern" file                   # Search for pattern in file
cat file | grep "pattern"            # Use grep with pipe input
grep -i "pattern" file               # Case-insensitive search
grep -r "pattern" /path/             # Recursive search in directory
grep -w "word" file                  # Match whole word
grep -x "exact line" file            # Match entire line

📂 Multiple Files / Recursion

bash

grep "pattern" file1 file2           # Search in multiple files
grep -r "pattern" .                  # Recursive from current dir
grep -R "pattern" .                  # Like -r but follows symlinks

🧩 Using Regular Expressions

bash

grep "patt[aeiou]rn" file            # Match character classes
grep "pattern.*end" file             # Match line with pattern to end
grep -E "one|two" file               # Use extended regex (egrep)
grep -o "pattern" file               # Print only matched parts

📦 Count & Line Info

bash

grep -c "pattern" file               # Count matching lines
grep -n "pattern" file               # Show line numbers
grep -H "pattern" file               # Show filename (default if multiple files)
grep -A 3 "pattern" file             # 3 lines **After** match
grep -B 2 "pattern" file             # 2 lines **Before** match
grep -C 4 "pattern" file             # 4 lines **Context** (before & after)

🚫 Invert / Exclude

bash

grep -v "pattern" file                          # Show lines NOT matching
grep -v -e "pattern1" -e "pattern2"  # Exclude multiple patterns

📄 Useful with Files

bash

grep "pattern" *.log                                  # Search in all .log files
grep "pattern" $(find . -name "*.sh")   # Combine with find

📁 Search by Filename

bash

grep -l "pattern" *                 # Show only filenames with match
grep -L "pattern" *                 # Show files WITHOUT match

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🧠 Tip: Use grep -P for Perl-style regex (if supported), and grep --color=auto for highlighting matches.