Based on the job description, here are 6-10 important requirements for the Linux OS System Engineer position, in order of importance, along with an importance rating (0-10):

1. **Strong experience in Linux Operating System** (Importance: 10) - This is the core requirement for the job, and the candidate must have in-depth knowledge and experience with Linux OS.
2. **Min. of 4 years of experience in the Linux Operating System** (Importance: 9) - The candidate must have a significant amount of experience working with Linux OS, which is essential for an enterprise-level system engineer.
3. **Global support experience working with internal and external stakeholders** (Importance: 8.5) - The ability to work with global stakeholders, both internal and external, is crucial for this role, which requires collaboration and communication with various teams.
4. **Prior Enterprise Customer experience** (Importance: 8) - Experience supporting global clients or customers is essential, as it demonstrates the candidate's ability to work with external customers and understand their needs.
5. **Direct experience working for vendors and supporting paying customers** (Importance: 7.5) - Experience working with vendors like Cisco, Palo Alto, Checkpoint, Sophos, etc. is valuable, as it shows the candidate's ability to work with various technologies and support paying customers.
6. **Knowledge of any Scripting Languages like Bash, PowerShell, and Python** (Importance: 7) - Scripting skills are essential for a system engineer, and knowledge of languages like Bash, PowerShell, and Python is a significant plus.
7. **Excellent communication skills** (Importance: 6.5) - Good communication skills are necessary for this role, as the candidate will need to collaborate with various teams and stakeholders, both internal and external.
8. **Ability to work in a rotation/shifting schedule** (Importance: 6) - The candidate must be able to work in a rotation/shifting schedule, which requires flexibility and adaptability.
9. **Onsite work arrangement** (Importance: 5) - The candidate must be willing to work onsite, which may require relocation or a significant commute.
10. **Salary expectations (up to P90K)** (Importance: 4) - While salary is an important consideration, it is not as critical as the other requirements, which focus on skills, experience, and fit for the role.

Note that the importance ratings are subjective and may vary depending on the specific needs and priorities of the organization.