本文介绍了在Linux系统中临时修改网络配置（如开启IP转发和重用TIME_WAIT套接字）以及在`/etc/sysctl.conf`文件中永久设置参数（如swappiness、sysrq、ARP公告等），以优化网络性能和资源管理。
1.临时修改
echo 1 > /proc/sys/net/ipv4/ip_forward
echo 1 > /proc/sys/net/ipv4/tcp_tw_reuse
2.配置文件修改
vim /etc/sysctl.conf
net.ipv4.ip_forward = 1
net.ipv4.tcp_tw_reuse = 1
vm.swappiness = 0
kernel.sysrq = 1
net.ipv4.neigh.default.gc_stale_time = 120
net.ipv4.conf.all.rp_filter = 0
net.ipv4.conf.default.rp_filter = 0
net.ipv4.conf.default.arp_announce = 2
net.ipv4.conf.lo.arp_announce = 2
net.ipv4.conf.all.arp_announce = 2
net.ipv4.tcp_max_tw_buckets = 5000
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 1024
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_slow_start_after_idle
net.ipv4.tcp_tw_reuse = 1
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