# # 유용한 OS 관련 명령어 # 1. hostname 변경 # hostname young # hostname vinus # hostname vinus # vi /etc/hosts : # 192.9.200.1 young loghost <-- old loghost 192.9.200.1 vinus loghost <-- new loghost :wq # vi /etc/nodename vinus : :wq # cd /etc/net # ls ticlts/ ticots/ ticotsord/ * directory 내의 모든 hosts file의 young 을 vinus 로 바꾸어줌 # vi /etc/hostname.le0 ( network interface ) vinus : :wq 2. network checking by ping , spray, zeus# ping vinus vinus is alive --> network is ok zeus# ping vinus no answer from vinus --> network fail zeus# spray vinus --> network perf 측정 및 collision 점검 sending 1162 packets of length 86 to vinus ... no packets dropped by vinus 2464 packets/sec, 211915 bytes/sec zeus# rpcinfo -u vinus nfs --> nfs server 의 기능 확인 program 100003 version 2 ready and waiting program 100003 version 3 ready and waiting zeus# dfshares vinus --> vinus system 의 nfs share 정보 확인 RESOURCE SERVER ACCESS TRANSPORT ns:/service3 vinus - - ns:/service1 vinus - - zeus# cd /net/vinus --> automount the remote share directory zeus# ls service1/ service3/ zeus# mount /net/zeus/service1/COM on zeus:/service2/COM nosuid/remote on 토 2월 15 /net/zeus/service3/PATCH on zeus:/service2/PATCH nosuid/remote on 토 2월 zeus# vmstat 2 --> memory 및 swap 영역 확인 2 초마다 monitoring procs memory page disk faults cpu r b w swap free re mf pi po fr de sr f0 s1 s2 s3 in sy cs us sy id 0 0 0 55980 18724 0 1 0 0 0 0 0 0 0 0 0 2 9 13 0 1 99 0 0 0 103672 6752 0 6 0 0 0 0 0 0 0 0 0 5 7 18 1 0 99 zeus# telnet vinus smtp ---> smtp (sendmail) version 확인 Trying 210.126.252.14... Connected to young. Escape character is '^]'. 220 cupid.lgic.co.kr ESMTP Sendmail 8.7.1H1/8.7.1; Sat,