◆当blogは、Linuxサーバ構築する際の実際の設定手順を個人的メモとして記載しております。LinuC試験の役に立つ情報があるかも…？

LinuC（Linux技術者認定資格）＆リナックスサーバ構築設定事例

【Linux】サーバーの状態確認（５）

プロセスの状態表示
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# ps aux
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1 0.0 0.2 19360 1388 ?        Ss   Mar08   0:04 /sbin/init
root         2 0.0 0.0      0     0 ?        S    Mar08   0:01 [kthreadd]
root         3 0.0 0.0      0     0 ?        S    Mar08   0:00 [migration/0]
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パケットフィルタリングの状態表示
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# iptables -L
DROP       all -- anywhere             255.255.255.255
DROP       all -- anywhere             224.0.0.1
ACCEPT     all -- 192.168.0.0/24       anywhere
ACCEPT     all -- anywhere             anywhere            state RELATED,ESTABLISHED
ACCEPT     tcp -- 172.20.0.0/24        anywhere            tcp dpt:ssh state NEW
ACCEPT     udp -- 172.20.0.0/24        anywhere            udp dpts:snmp:snmptrap
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TCPラッパー (/etc/hosts.allow) によるアクセス制限①
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# cat /etc/hosts.allow
sshd: 192.168.0.16
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TCPラッパー (/etc/hosts.allow) によるアクセス制限②
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# cat /etc/hosts.allowdeny
ALL: ALL
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ホスト名とIPアドレスの対応付け
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# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
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