rootなのに
仮想環境で遊んでいた際、ネットワーク回りのテストをしている時に /proc/net配下を rm * とすると
$ rm * rm: cannot remove 'anycast6': Operation not permitted rm: cannot remove 'arp': Operation not permitted rm: cannot remove 'connector': Operation not permitted rm: cannot remove 'dev': Operation not permitted rm: cannot remove 'dev_mcast': Operation not permitted rm: cannot remove 'dev_snmp6': Is a directory rm: cannot remove 'fib_trie': Operation not permitted rm: cannot remove 'fib_triestat': Operation not permitted rm: cannot remove 'icmp': Operation not permitted rm: cannot remove 'icmp6': Operation not permitted rm: cannot remove 'if_inet6': Operation not permitted rm: cannot remove 'igmp': Operation not permitted rm: cannot remove 'igmp6': Operation not permitted rm: cannot remove 'ip6_flowlabel': Operation not permitted rm: cannot remove 'ip6_mr_cache': Operation not permitted rm: cannot remove 'ip6_mr_vif': Operation not permitted rm: cannot remove 'ip6_tables_matches': Operation not permitted rm: cannot remove 'ip6_tables_names': Operation not permitted rm: cannot remove 'ip6_tables_targets': Operation not permitted rm: cannot remove 'ip_mr_cache': Operation not permitted rm: cannot remove 'ip_mr_vif': Operation not permitted rm: cannot remove 'ip_tables_matches': Operation not permitted rm: cannot remove 'ip_tables_names': Operation not permitted rm: cannot remove 'ip_tables_targets': Operation not permitted rm: cannot remove 'ipv6_route': Operation not permitted rm: cannot remove 'ip_vs': Operation not permitted rm: cannot remove 'ip_vs_app': Operation not permitted rm: cannot remove 'ip_vs_conn': Operation not permitted rm: cannot remove 'ip_vs_conn_sync': Operation not permitted rm: cannot remove 'ip_vs_stats': Operation not permitted rm: cannot remove 'ip_vs_stats_percpu': Operation not permitted rm: cannot remove 'mcfilter': Operation not permitted rm: cannot remove 'mcfilter6': Operation not permitted rm: cannot remove 'netfilter': Is a directory rm: cannot remove 'netlink': Operation not permitted rm: cannot remove 'netstat': Operation not permitted rm: cannot remove 'packet': Operation not permitted rm: cannot remove 'protocols': Operation not permitted rm: cannot remove 'psched': Operation not permitted rm: cannot remove 'ptype': Operation not permitted rm: cannot remove 'raw': Operation not permitted rm: cannot remove 'raw6': Operation not permitted rm: cannot remove 'route': Operation not permitted rm: cannot remove 'rpc': Is a directory rm: cannot remove 'rt6_stats': Operation not permitted rm: cannot remove 'rt_acct': Operation not permitted rm: cannot remove 'rt_cache': Operation not permitted rm: cannot remove 'snmp': Operation not permitted rm: cannot remove 'snmp6': Operation not permitted rm: cannot remove 'sockstat': Operation not permitted rm: cannot remove 'sockstat6': Operation not permitted rm: cannot remove 'softnet_stat': Operation not permitted rm: cannot remove 'stat': Is a directory rm: cannot remove 'tcp': Operation not permitted rm: cannot remove 'tcp6': Operation not permitted rm: cannot remove 'udp': Operation not permitted rm: cannot remove 'udp6': Operation not permitted rm: cannot remove 'udplite': Operation not permitted rm: cannot remove 'udplite6': Operation not permitted rm: cannot remove 'unix': Operation not permitted rm: cannot remove 'wireless': Operation not permitted rm: cannot remove 'xfrm_stat': Operation not permitted
というわけで全部失敗。
ディレクトリ全体も777にしたのにUbuntuではダメでした。何が原因なんだろう...
