audit_encode_nv_string - Linux
Overview
audit_encode_nv_string is a command-line tool for encoding case-insensitive null-terminated NUL-separated key-value string pairs into a binary format used by the Linux audit system. It is primarily used for serializing key-value pairs for storage or transmission in a manner that ensures data integrity and consistency.
Syntax
audit_encode_nv_string [-h] [-q] [-s OUTPUT_FILE] [-i KEY_VALUE_FILE] [-S 'STRING1=STRING2'] ...
Options/Flags
- -h, –help: Display usage information and exit.
- -q, –quiet: Suppress all non-error messages.
- -s, –stdout: Write output to stdout instead of a file.
- -i, –input: Read key-value pairs from the specified file.
- -S, –string: Specify a key-value pair to encode as a string. Can be repeated for multiple pairs.
Examples
Encode a single key-value pair from a string:
audit_encode_nv_string -S "user=alice"
Encode key-value pairs from a file:
audit_encode_nv_string -i key_value_file
Encode multiple key-value pairs from strings:
audit_encode_nv_string -S "type=LOGIN" -S "user=alice" -S "host=server1"
Save encoded output to a file:
audit_encode_nv_string -i key_value_file -s encoded_file
Common Issues
- Incorrect input format: Ensure that the input file or strings adhere to the NUL-separated key-value format.
- Duplicate keys: Keys in the input should be unique. Duplicate keys may result in unexpected behavior.
Integration
audit_encode_nv_string can be used in conjunction with other Linux commands and tools, such as:
- auditctl: To set or modify audit rules that specify key-value pairs for recording.
- ausearch: To search for audit records containing specific key-value pairs.
Related Commands
- auditctl
- ausearch
- auditd