linux基本操作維護

修改hostname

hostnamectl set-hostname 192-168-1-1

掛載磁盤

df -h
fdisk -l

#掛載磁盤
mkdir /data
rm -rf /data/*
mkfs.xfs /dev/sdb
mount /dev/sdb /data

#設置開機自動掛載
echo ‘’ >> /etc/fstab
echo ‘/dev/sdg /data7 xfs defaults 0 0’ >> /etc/fstab

#關閉THP
echo ‘’ >> /etc/rc.d/rc.local
echo ‘if test -f /sys/kernel/mm/transparent_hugepage/enabled; then’ >> /etc/rc.d/rc.local
echo ‘echo never > /sys/kernel/mm/transparent_hugepage/enabled’ >> /etc/rc.d/rc.local
echo ‘fi’ >> /etc/rc.d/rc.local
echo ‘if test -f /sys/kernel/mm/transparent_hugepage/defrag; then’ >> /etc/rc.d/rc.local
echo ‘echo never > /sys/kernel/mm/transparent_hugepage/defrag’ >> /etc/rc.d/rc.local
echo ‘fi’ >> /etc/rc.d/rc.local

chmod u+x /etc/rc.d/rc.local

#修改swap配置
echo ‘vm.swappiness = 1’ >> /etc/sysctl.conf

echo ‘vm.max_map_count=262144’ >> /etc/sysctl.conf

配置telenet

配置telnet
yum install xinetd telnet telnet-server -y

systemctl enable xinetd.service
systemctl enable telnet.socket

systemctl start telnet.socket
systemctl start xinetd