systemctl start dhcpd
netstat -anpu | grep ":67"
dhclient -d eth0
systemctl list-units
systemctl enable httpd.service
systemctl disable httpd.servie
systemctl status httpd.service
systemctl list-units --type=service
systemctl start httpd.service
systemctl stop httpd.service
systemctl restart httpd.service
systemctl list-unit-files --type=service
runlevel
init 3
runlevel
init 6
init 0
ps aux
ps -elf
top
pstree -aup
pstree -ap teacher
cp /dev/cdrom mycd.iso &
at
crontab
jobs
fg
pgrep -l "portmap"
kill -9 2869
killall -9 vim
date
at 15:01 2024-04-14
atq
atrm 2
cat /etc/crontab
crontab -e
crontab -e -u jerry
crontab -l -u jerry
crontab -r -u jerry
cp localhost.zone example.com.zone
named-checkconf -z /var/named/chroot/etc/named.conf
cd /var/named/chroot/var/named/
named-checkzone example.com benet.com.zone
/usr/local/bind/bin/nslookup www.test.com
chown ftp /var/ftp/pub
ls -ld /var/ftp/pub/
service vsftpd start
ftp 192.168.4.11
vi /etc/vsftpd/user_list
vi /etc/vsftpd/vsftpd.conf
vi /etc/vsftpd/vusers.list
cd /etc/vsftpd/
db_load -T -t hash -f vusers.list vusers.db
file vusers.db
chmod 600 /etc/vsftpd/vusers.*
ls -lh /etc/vsftpd/vusers.*
useradd -d /var/ftproot -s /sbin/nologin virtual
chmod 755 /var/ftproot/
vi /etc/pam.d/vsftpd.vu
vi /etc/vsftpd/vsftpd.conf
mkdir /etc/vsftpd/vusers_dir/
cd /etc/vsftpd/vusers_dir/
vi john
touch mike