+ cat /proc/sys/net/ipv4/ip_local_reserved_ports
40002
+ echo 50000
+ cat /proc/sys/net/ipv4/ip_local_reserved_ports
50000
+ echo 50000-50100
+ cat /proc/sys/net/ipv4/ip_local_reserved_ports
50000-50100
+ echo
+ cat /proc/sys/net/ipv4/ip_local_reserved_ports

+ echo 40000-50000,50000-50100,50101-50101
+ cat /proc/sys/net/ipv4/ip_local_reserved_ports
40000-50101
+ set +e
+ echo 40000a
rp_test.sh: line 12: echo: write error: Invalid argument
+ cat /proc/sys/net/ipv4/ip_local_reserved_ports
40000-50101
+ echo 40000-
rp_test.sh: line 14: echo: write error: Invalid argument
+ cat /proc/sys/net/ipv4/ip_local_reserved_ports
40000-50101
+ echo 70000
rp_test.sh: line 16: echo: write error: Invalid argument
+ cat /proc/sys/net/ipv4/ip_local_reserved_ports
40000-50101
+ echo 40000-30000
rp_test.sh: line 18: echo: write error: Invalid argument
+ cat /proc/sys/net/ipv4/ip_local_reserved_ports
40000-50101
+ echo 40000,
+ cat /proc/sys/net/ipv4/ip_local_reserved_ports
40000
+ echo 40000,40001,40000b
rp_test.sh: line 22: echo: write error: Invalid argument
+ cat /proc/sys/net/ipv4/ip_local_reserved_ports
40000-40001
+ echo 40000 40001 40002
rp_test.sh: line 24: echo: write error: Invalid argument
+ cat /proc/sys/net/ipv4/ip_local_reserved_ports
40000-40001
+ echo 40000,40001 40002
+ cat /proc/sys/net/ipv4/ip_local_reserved_ports
40002