156-587 · Question #28
After kernel debug with "fw ctl debug" you received a huge amount of information. It was saved in a very large file that is difficult to open and analyze with standard text editors. Suggest a…
The correct answer is A. Divide debug information into smaller files. Use "fw ctl kdebug -f -o "filename" -m 25 - s "1024". Option A is correct because fw ctl kdebug is specifically designed to capture kernel debug output into files with a size limit - the -s "1024" flag caps each file at 1024KB and automatically rotates to a new file when that limit is reached, while -m 25 sets the maximum number…
Question
After kernel debug with "fw ctl debug" you received a huge amount of information. It was saved in a very large file that is difficult to open and analyze with standard text editors. Suggest a solution to solve this issue.
Options
- ADivide debug information into smaller files. Use "fw ctl kdebug -f -o "filename" -m 25 - s "1024"
- BUse "fw ctl zdebug" because of 1024KB buffer size
- CUse Check Point InfoView utility to analyze debug output
- DReduce debug buffer to 1024KB and run debug for several times
How the community answered
(59 responses)- A76% (45)
- B14% (8)
- C3% (2)
- D7% (4)
Explanation
Option A is correct because fw ctl kdebug is specifically designed to capture kernel debug output into files with a size limit - the -s "1024" flag caps each file at 1024KB and automatically rotates to a new file when that limit is reached, while -m 25 sets the maximum number of rotation files, keeping output in manageable chunks that any text editor can open.
Option B is wrong because fw ctl zdebug drops output directly to the console/buffer and does not write to files at all, making it worse for capturing and reviewing large debug sessions, not better. Option C is a fabricated distractor - there is no standard Check Point utility called "InfoView" designed for analyzing kernel debug output. Option D is backwards: reducing the buffer and re-running multiple times wastes time, risks missing relevant events between runs, and still doesn't address the file-size problem since each run could still produce a large file.
Memory tip: Think of the k in kdebug as "keeps files small" - it's the file-aware version of the debug command, while zdebug sends output to the zero-storage console buffer. Whenever you see a question about saving or managing debug output, kdebug with -s (size) is the answer.
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