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cat /etc/security/limits.conf
ulimit -a
/proc/PID/limits
cat /proc/sys/fs/file-max
cat /proc/sys/vm/max_map_count
ulimit -SHn 2048000
ulimit -SHu unlimited
cat > /etc/security/limits.conf << EOF
* soft nofile 2048000
* hard nofile 2048000
* soft noproc unlimited
* hard noproc unlimited
EOF
sysctl -p /etc/sysctl.conf
sysctl -w fs.file-max=38180200
sysctl -w vm.max_map_count=6553000
cat >/etc/sysctl.conf<<EOF
fs.file-max=38180200
vm.max_map_count=6553000
EOF
sysctl -p
docker run -d --ulimit nofile=204800:409600 --ulimit nproc=10240:20480 --name=test centos /bin/bash -c 'tail -f /var/log/lastlog'
docker exec test /bin/bash -c 'ulimit -a'
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