Antes de instalar coisas no meu servidor, eu queria reduzir os serviços desnecessários. etc
Aqui está o topo:
615 ubuntu 20 0 26948 7384 1648 S 0.0 1.2 0:00.39 bash
732 ubuntu 20 0 28188 4144 1032 S 0.5 0.7 0:00.77 screen
811 ubuntu 20 0 23452 3952 1712 S 0.0 0.7 0:00.20 bash
587 root 20 0 73080 3440 2676 S 0.0 0.6 0:00.01 sshd
463 root 20 0 49684 2784 2208 S 0.0 0.5 0:00.00 sshd
1 root 20 0 24052 2132 1316 S 0.0 0.4 0:00.26 init
614 ubuntu 20 0 73080 1560 800 S 0.0 0.3 0:00.23 sshd
469 syslog 20 0 52728 1480 1088 S 0.0 0.2 0:00.06 rsyslogd
1539 ubuntu 20 0 21436 1296 988 R 0.5 0.2 0:00.45 top
713 ubuntu 20 0 25456 1172 936 S 0.0 0.2 0:00.01 screen
223 root 20 0 21320 1148 764 S 0.0 0.2 0:00.03 udevd
480 messageb 20 0 24152 968 700 S 0.0 0.2 0:00.04 dbus-daemon
528 root 20 0 18976 892 696 S 0.0 0.1 0:00.00 cron
307 root 20 0 21316 732 336 S 0.0 0.1 0:00.00 udevd
298 root 20 0 21316 684 304 S 0.0 0.1 0:00.00 udevd
521 root 20 0 4180 640 536 S 0.0 0.1 0:00.00 getty
524 root 20 0 4180 640 536 S 0.0 0.1 0:00.00 getty
220 root 20 0 17096 636 452 S 0.0 0.1 0:00.04 upstart-udev-br
513 root 20 0 4180 636 536 S 0.0 0.1 0:00.00 getty
518 root 20 0 4180 636 536 S 0.0 0.1 0:00.00 getty
522 root 20 0 4180 636 536 S 0.0 0.1 0:00.00 getty
581 root 20 0 4180 636 536 S 0.0 0.1 0:00.00 getty
384 root 20 0 7124 604 120 S 0.0 0.1 0:00.00 dhclient3
339 root 20 0 15048 392 196 S 0.0 0.1 0:00.01 upstart-socket-
529 daemon 20 0 16776 376 220 S 0.0 0.1 0:00.00 atd
2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 0:00.05 ksoftirqd/0
4 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kworker/0:0
5 root 20 0 0 0 0 S 0.0 0.0 0:00.01 kworker/u:0
6 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0
7 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 cpuset
8 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 khelper
9 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 netns
10 root 20 0 0 0 0 S 0.0 0.0 0:00.00 xenwatch
11 root 20 0 0 0 0 S 0.0 0.0 0:00.15 xenbus
12 root 20 0 0 0 0 S 0.0 0.0 0:00.00 sync_supers
13 root 20 0 0 0 0 S 0.0 0.0 0:00.00 bdi-default
14 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kintegrityd
15 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kblockd
16 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 ata_sff
17 root 20 0 0 0 0 S 0.0 0.0 0:00.00 khubd
18 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 md
19 root 20 0 0 0 0 S 0.0 0.0 0:00.00 khungtaskd
20 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kworker/u:1
21 root 20 0 0 0 0 S 0.5 0.0 0:00.11 kworker/0:1
22 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kswapd0
23 root 25 5 0 0 0 S 0.0 0.0 0:00.00 ksmd
24 root 20 0 0 0 0 S 0.0 0.0 0:00.00 fsnotify_mark
25 root 20 0 0 0 0 S 0.0 0.0 0:00.00 ecryptfs-kthrea
O que posso desativar com segurança e como?
Provavelmente não há nada que você não precise. Se você não precisa de acesso ssh a este sistema, você pode remover openssh-server . Se você tiver um IP estático, poderá configurá-lo em /etc/network/interfaces e dhclient3 não será mais iniciado.
Tudo na lista com PID & lt; = 25 é um encadeamento do kernel mesmo assim (exceto, é claro, para o PID 1, que é sempre init ).