【linux】打印linux系统中有关tcp的设置

原创

安安爸Chris 2022-08-20 22:28:20 ©著作权

文章标签 linux tcp/ip 网络 bash 文章分类 云平台云计算

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print_linux_tcp_settings.sh

#!/bin/bash

echo "# Receive Queue Size per CPU Core, number of packets"
echo "/proc/sys/net/core/netdev_max_backlog  = "`cat /proc/sys/net/core/netdev_max_backlog`
echo ""
echo "# Accept Queue Limit, maximum number of established"
echo "# connections waiting for accept() per listener."
echo "/proc/sys/net/core/somaxconn           = "`cat /proc/sys/net/core/somaxconn`
echo ""
echo "# The maximum number of connections in the SYN_RECV queue"
echo "/proc/sys/net/ipv4/tcp_max_syn_backlog = "`cat /proc/sys/net/ipv4/tcp_max_syn_backlog`
echo ""
echo "# the retry times for SYN"
echo "/proc/sys/net/ipv4/tcp_syn_retries     = "`cat /proc/sys/net/ipv4/tcp_syn_retries`
echo "# the retry times for synack"
echo "/proc/sys/net/ipv4/tcp_synack_retries  = "`cat /proc/sys/net/ipv4/tcp_synack_retries`
echo ""
echo "# Timeout in seconds to close client connections in"
echo "# TIME_WAIT after receiving FIN packet."
echo "/proc/sys/net/ipv4/tcp_fin_timeout     = "`cat /proc/sys/net/ipv4/tcp_fin_timeout`
echo ""
echo "/proc/sys/net/ipv4/tcp_syncookies      = "`cat /proc/sys/net/ipv4/tcp_syncookies`
echo ""
echo "limitation settings:"
ulimit

样例结果如下

# Receive Queue Size per CPU Core, number of packets
/proc/sys/net/core/netdev_max_backlog  = 1000

# Accept Queue Limit, maximum number of established
# connections waiting for accept() per listener.
/proc/sys/net/core/somaxconn           = 4096

# The maximum number of connections in the SYN_RECV queue
/proc/sys/net/ipv4/tcp_max_syn_backlog = 2048

# the retry times for SYN
/proc/sys/net/ipv4/tcp_syn_retries     = 6
# the retry times for synack
/proc/sys/net/ipv4/tcp_synack_retries  = 1

# Timeout in seconds to close client connections in
# TIME_WAIT after receiving FIN packet.
/proc/sys/net/ipv4/tcp_fin_timeout     = 60

/proc/sys/net/ipv4/tcp_syncookies      = 1

limitation settings:
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 515002
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1024
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 515002
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited