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Why connection refused at 544 port in rsh

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http://unix.stackexchange.com – I got an error, I didn't understand why this happens. Please help me to overcome from this problem. Command strace -c rsh localhost ulimit -n Output connect to address 127.0.0.1 port 544: Connection refused Trying krb4 rsh... connect to address 127.0.0.1 port 544: Connection refused trying normal rsh (/usr/bin/rsh) rcmd: socket: Permission denied % time seconds usecs/call calls errors syscall ------ ----------- ----------- --------- --------- ---------------- 28.39 0.000113 2 58 read 27.64 0.000110 16 7 write 16.83 (HowTos)