1.3 Configurer le kernel

Afficher la configuration:

 # sysctl -a | more
 kernel.sched_child_runs_first = 0
 kernel.sched_min_granularity_ns = 2000000
 kernel.sched_latency_ns = 10000000
 kernel.sched_wakeup_granularity_ns = 2000000
 kernel.sched_shares_ratelimit = 500000
 kernel.sched_shares_thresh = 4
 kernel.sched_features = 32611451
 kernel.sched_migration_cost = 500000

Modifier les paramètres

 # cat /proc/sys/fs/file-max 
 404967
 # echo "110000" > proc/sys/fs/file-max

Ou

 # sysctl fs.file-max 
 fs.file-max = 404967
 # sysctl -w "fs.file-max=110000"

Les modifications ne sont pas garder au reboot, il faut les inscrires dans le fichier /etc/sysctl.conf

 # cat /etc/sysctl.conf 
 #
 # /etc/sysctl.conf - Configuration file for setting system variables
 # See /etc/sysctl.d/ for additonal system variables
 # See sysctl.conf (5) for information.
 #

 #kernel.domainname = example.com<br<
 # Uncomment the following to stop low-level messages on console
 #kernel.printk = 3 4 1 3
 ...