当我尝试在 Ubuntu Server 16.04 上安装 fail2ban 时
apt-get -install fail2ban
我收到错误消息：“处理 fail2ban 时遇到错误”我已尝试使用这些命令卸载 fail2ban，但当我尝试安装此包时仍然收到此错误消息。
apt-get purge fail2ban
apt-get autoremove
apt-get autoclean
dpkg --configure -a
apt-get dist-upgrade
apt-get -f install
apt-get update
apt-get upgrade
/etc/fail2ban/jail.local
[pureftp]
enabled = true
port = ftp
filter = pureftp
logpath = /var/log/syslog
maxretry = 3
[dovecot-pop3imap]
enabled = true
filter = dovecot-pop3imap
action = iptables-multiport[]name=dovecot-pop3imap, port="pop3,pop3s,imap,imaps", protocol=tcp
logpath = /var/log/mail.log
maxretry = 5
[postfix-sasl]
enabled = true
port = smtp
filter = postfix-sasl
logpath = /var/log/mail.log
maxretry = 3
如果您需要更多信息，请直接询问。
有人能帮我吗？