collection of useful, useless, dangerous sysctl settings for pinguin os

linux_sysctl.conf

# https://gist.github.com/gretel/6e7568f35dd3c3284600
fs.file-max=65535
fs.inotify.max_queued_events=65536
fs.inotify.max_user_watches=65536
fs.suid_dumpable=0
kernel.core_uses_pid=1
kernel.kptr_restrict=1
kernel.pid_max=65536
kernel.printk=4 4 1 7
kernel.randomize_va_space=1
kernel.sem=250 32000 100 128
kernel.shmall=1011983
kernel.shmmax=2181622298
kernel.shmmni=4096
kernel.sysrq=0
net.core.netdev_max_backlog=100000
net.core.rmem_default=33554432
net.core.rmem_max=33554432
net.core.wmem_default=33554432
net.core.wmem_max=33554432
net.ipv4.conf.all.accept_redirects=0
net.ipv4.conf.all.accept_source_route=0
net.ipv4.conf.all.arp_announce=2
net.ipv4.conf.all.arp_ignore=1
net.ipv4.conf.all.log_martians=1
net.ipv4.conf.all.rp_filter=1
net.ipv4.conf.all.rp_filter=1
net.ipv4.conf.all.secure_redirects=0
net.ipv4.conf.all.send_redirects=0
net.ipv4.conf.all.shared_media=1
net.ipv4.conf.default.accept_redirects=0
net.ipv4.conf.default.accept_source_route=0
net.ipv4.conf.default.log_martians=1
net.ipv4.conf.default.rp_filter=1
net.ipv4.conf.default.secure_redirects=0
net.ipv4.conf.default.send_redirects=0
net.ipv4.conf.default.shared_media=1
net.ipv4.icmp_echo_ignore_broadcasts=1
net.ipv4.icmp_ignore_bogus_error_responses=1
net.ipv4.icmp_ratelimit=100
net.ipv4.icmp_ratemask=88089
net.ipv4.ip_forward=0
net.ipv4.ip_local_port_range=2000 65000
net.ipv4.tcp_fin_timeout=30
net.ipv4.tcp_keepalive_time=1800
net.ipv4.tcp_max_syn_backlog=30000
net.ipv4.tcp_max_tw_buckets=2000000
net.ipv4.tcp_mem=786432 1048576 26777216
net.ipv4.tcp_no_metrics_save=1
net.ipv4.tcp_rfc1337=1
net.ipv4.tcp_rmem=10240 87380 33554432
net.ipv4.tcp_sack=1
net.ipv4.tcp_synack_retries=2
net.ipv4.tcp_syncookies=1
net.ipv4.tcp_timestamps=1
net.ipv4.tcp_tw_recycle=0
net.ipv4.tcp_tw_reuse=0
net.ipv4.tcp_window_scaling=1
net.ipv4.tcp_wmem=10240 87380 33554432
net.ipv6.conf.all.accept_ra=0
net.ipv6.conf.all.accept_ra_defrtr=0
net.ipv6.conf.all.accept_ra_pinfo=0
net.ipv6.conf.all.accept_redirects=0
net.ipv6.conf.all.accept_source_route=0
net.ipv6.conf.all.autoconf=0
net.ipv6.conf.all.disable_ipv6=1
net.ipv6.conf.all.forwarding=0
net.ipv6.conf.all.use_tempaddr=2
net.ipv6.conf.default.accept_ra=0
net.ipv6.conf.default.accept_ra_defrtr=0
net.ipv6.conf.default.accept_ra_pinfo=0
net.ipv6.conf.default.accept_redirects=0
net.ipv6.conf.default.accept_source_route=0
net.ipv6.conf.default.autoconf=0
net.ipv6.conf.default.dad_transmits=0
net.ipv6.conf.default.forwarding=0
net.ipv6.conf.default.max_addresses=1
net.ipv6.conf.default.router_solicitations=0
net.ipv6.conf.default.use_tempaddr=2
vm.dirty_background_ratio=5
vm.dirty_expire_centisecs=1000
vm.dirty_ratio=10
vm.min_free_kbytes=65535
vm.mmap_min_addr=65535
vm.overcommit_memory=0
vm.swappiness=0
vm.vfs_cache_pressure=50