I got: warning: /etc/sysctl.d/README(1): invalid syntax, continuing... warning: /etc/sysctl.d/README(2): invalid syntax, continuing... warning: /etc/sysctl.d/README(3): invalid syntax, continuing... warning: /etc/sysctl.d/README(4): invalid syntax, continuing... warning: /etc/sysctl.d/README(5): invalid syntax, continuing... warning: /etc/sysctl.d/README(6): invalid syntax, continuing... warning: /etc/sysctl.d/README(8): invalid syntax, continuing... warning: /etc/sysctl.d/README(9): invalid syntax, continuing... error: "Invalid argument" setting key "kernel.modules_disabled" error: permission denied on key 'kernel.sg-big-buff' error: permission denied on key 'kernel.random.poolsize' error: permission denied on key 'kernel.random.entropy_avail' error: permission denied on key 'kernel.random.boot_id' error: permission denied on key 'kernel.random.uuid' error: permission denied on key 'kernel.ngroups_max' error: permission denied on key 'kernel.cap_last_cap' error: permission denied on key 'kernel.bootloader_type' error: permission denied on key 'kernel.bootloader_version' error: permission denied on key 'kernel.ostype' error: permission denied on key 'kernel.osrelease' error: permission denied on key 'kernel.version' error: permission denied on key 'kernel.pty.nr' error: permission denied on key 'kernel.sched_domain.cpu0.domain0.name' error: permission denied on key 'kernel.sched_domain.cpu0.domain1.name' error: permission denied on key 'kernel.sched_domain.cpu1.domain0.name' error: permission denied on key 'kernel.sched_domain.cpu1.domain1.name' error: permission denied on key 'kernel.sched_domain.cpu2.domain0.name' error: permission denied on key 'kernel.sched_domain.cpu2.domain1.name' error: permission denied on key 'kernel.sched_domain.cpu3.domain0.name' error: permission denied on key 'kernel.sched_domain.cpu3.domain1.name' error: permission denied on key 'kernel.sched_domain.cpu4.domain0.name' error: permission denied on key 'kernel.sched_domain.cpu4.domain1.name' error: permission denied on key 'kernel.sched_domain.cpu5.domain0.name' error: permission denied on key 'kernel.sched_domain.cpu5.domain1.name' error: permission denied on key 'kernel.sched_domain.cpu6.domain0.name' error: permission denied on key 'kernel.sched_domain.cpu6.domain1.name' error: permission denied on key 'kernel.sched_domain.cpu7.domain0.name' error: permission denied on key 'kernel.sched_domain.cpu7.domain1.name' error: permission denied on key 'vm.nr_pdflush_threads' error: "Invalid argument" setting key "vm.drop_caches" error: "Invalid argument" setting key "vm.percpu_pagelist_fraction" error: permission denied on key 'fs.inode-nr' error: permission denied on key 'fs.inode-state' error: permission denied on key 'fs.file-nr' error: permission denied on key 'fs.dentry-state' error: permission denied on key 'fs.aio-nr' error: "Invalid argument" setting key "fs.binfmt_misc.python3/2" error: "Invalid argument" setting key "fs.binfmt_misc.python3/2" error: "Invalid argument" setting key "fs.binfmt_misc.python3/2" error: "Invalid argument" setting key "fs.binfmt_misc.python3/2" error: "Invalid argument" setting key "fs.binfmt_misc.python3/2" error: "Invalid argument" setting key "fs.binfmt_misc.wine" error: "Invalid argument" setting key "fs.binfmt_misc.wine" error: "Invalid argument" setting key "fs.binfmt_misc.wine" error: "Invalid argument" setting key "fs.binfmt_misc.wine" error: "Invalid argument" setting key "fs.binfmt_misc.wine" error: "Invalid argument" setting key "fs.binfmt_misc.jarwrapper" error: "Invalid argument" setting key "fs.binfmt_misc.jarwrapper" error: "Invalid argument" setting key "fs.binfmt_misc.jarwrapper" error: "Invalid argument" setting key "fs.binfmt_misc.jarwrapper" error: "Invalid argument" setting key "fs.binfmt_misc.jarwrapper" error: "Invalid argument" setting key "fs.binfmt_misc.jar" error: "Invalid argument" setting key "fs.binfmt_misc.jar" error: "Invalid argument" setting key "fs.binfmt_misc.jar" error: "Invalid argument" setting key "fs.binfmt_misc.jar" error: "Invalid argument" setting key "fs.binfmt_misc.jar" error: "Invalid argument" setting key "fs.binfmt_misc.cli" error: "Invalid argument" setting key "fs.binfmt_misc.cli" error: "Invalid argument" setting key "fs.binfmt_misc.cli" error: "Invalid argument" setting key "fs.binfmt_misc.cli" error: "Invalid argument" setting key "fs.binfmt_misc.cli" error: "Invalid argument" setting key "fs.binfmt_misc.python2/7" error: "Invalid argument" setting key "fs.binfmt_misc.python2/7" error: "Invalid argument" setting key "fs.binfmt_misc.python2/7" error: "Invalid argument" setting key "fs.binfmt_misc.python2/7" error: "Invalid argument" setting key "fs.binfmt_misc.python2/7" error: "Invalid argument" setting key "fs.binfmt_misc.status" error: permission denied on key 'fs.quota.lookups' error: permission denied on key 'fs.quota.drops' error: permission denied on key 'fs.quota.reads' error: permission denied on key 'fs.quota.writes' error: permission denied on key 'fs.quota.cache_hits' error: permission denied on key 'fs.quota.allocated_dquots' error: permission denied on key 'fs.quota.free_dquots' error: permission denied on key 'fs.quota.syncs' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: permission denied on key 'dev.cdrom.info' error: "No such file or directory" setting key "net.netfilter.nf_log.0" error: "No such file or directory" setting key "net.netfilter.nf_log.1" error: "No such file or directory" setting key "net.netfilter.nf_log.2" error: "No such file or directory" setting key "net.netfilter.nf_log.3" error: "No such file or directory" setting key "net.netfilter.nf_log.4" error: "No such file or directory" setting key "net.netfilter.nf_log.5" error: "No such file or directory" setting key "net.netfilter.nf_log.6" error: "No such file or directory" setting key "net.netfilter.nf_log.7" error: "No such file or directory" setting key "net.netfilter.nf_log.8" error: "No such file or directory" setting key "net.netfilter.nf_log.9" error: "No such file or directory" setting key "net.netfilter.nf_log.10" error: "No such file or directory" setting key "net.netfilter.nf_log.11" error: "No such file or directory" setting key "net.netfilter.nf_log.12" net.ipv4.route.error_cost = 250 net.ipv4.route.error_burst = 1250 warning: /etc/sysctl.conf(588): invalid syntax, continuing... error: permission denied on key 'net.ipv4.tcp_available_congestion_control' error: permission denied on key 'net.ipv4.conf.all.mc_forwarding' error: permission denied on key 'net.ipv4.conf.default.mc_forwarding' error: permission denied on key 'net.ipv4.conf.lo.mc_forwarding' error: permission denied on key 'net.ipv4.conf.eth0.mc_forwarding' net.ipv4.icmp_ignore_bogus_error_responses = 1 net.ipv4.icmp_errors_use_inbound_ifaddr = 0 error: permission denied on key 'net.ipv6.conf.all.mc_forwarding' error: permission denied on key 'net.ipv6.conf.default.mc_forwarding' error: permission denied on key 'net.ipv6.conf.lo.mc_forwarding' error: permission denied on key 'net.ipv6.conf.eth0.mc_forwarding' error: permission denied on key 'sunrpc.transports' error: permission denied on key 'sunrpc.transports' error: permission denied on key 'sunrpc.transports' error: permission denied on key 'afs.afs_blocksUsed' I've commented all lines with "No such file or directory" and "Invalid argument" errors - problem solved.