sysctl-touch:
    file.touch:
        - name: /etc/sysctl.conf

/etc/sysctl.conf:
    file.append:
        - text:
            - net.core.rmem_max = 4194304
            - net.core.wmem_max = 1048576



Output:

[root@gig23 salt]# salt '*' state.sls sysctl-limits.sls
se15:

Summary
-----------
Succeeded: 0
Failed:   0
-----------
Total:    0
gig21:

Summary
-----------
Succeeded: 0
Failed:   0
-----------
Total:    0
[root@gig23 salt]#