/etc/services file 쓰기

root 계정으로 /etc/services file을 수정하려고 하는데 readonly 라며 수정이 되지 않습니다.

이유와 해결책을 알고 싶습니다.

아래는 message와 services file 내용 입니다.

....

canna           5680/tcp
tfido           60177/tcp                       # Ifmail
tfido           60177/udp                       # Ifmail
fido            60179/tcp                       # Ifmail
fido            60179/udp                       # Ifmail

# Local services

# start of wnn4_Kr services
wnn4_Kr              22305/tcp
# end of wnn4_Kr services

-----------------------------------------------------

[root@bell /etc]# ls -la services
-rw-r--r--    1 root     root        17969 May 14  2002 services
[root@bell /etc]# pwd
/etc
[root@bell /etc]# whoami
root
[root@bell /etc]# id
uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),6(disk),10(wheel)
[root@bell /etc]#