Which of the following commands displays an overview of the Postfix queue content to help identify remote sites that are causing excessive mail traffic? A. mailtraf B. queuequery C. qshape D. po...

The following Apache HTTPD configuration has been set up to create a virtual host available at www.example.com and www2.example.com: <VirtualHost *:80> ServerName www.example.com ServerNa...

在開發程式的時候，經常會需要使用「Log」或是「Console」等類別輸出某些文字訊息來告訴系統管理員程式執行的狀況。當程式作為背景服務來運行的時候，通常會將這些Log訊息寫進檔案系統內，方便日後查閱。然而，儲存在檔案系統中的每則文字訊息雖然可能只是短短的幾行字，但累積久了也是會佔用不少硬碟空間，如果沒有定期整理的話，可能哪天系統的可用空間就被歷史紀錄塞滿，而導致當機。為了避免程式輸出的訊息塞滿硬...

How are PAM modules organized and stored? A. As plain text files in /etc/security/ B. A statically linked binaries in /etc/pam.d/bin/ C. As Linux kernel modules within the respective sub director...

Which BIND option should be used to limit the IP addresses from which slave name servers may connect? A. allow-zone-transfer B. allow-transfer C. allow-secondary D. allow-slaves E. allow-querie...

Which of the following lines in the sshd configuration file should, if present, be changed in order to increase the security of the server? (Choose two.) A. Protocol 2, 1 B. PermitEmptyPasswords n...

There is a restricted area in a site hosted by Apache HTTPD, which requires users to authenticate against the file /srv/www/security/site-passwd. Which command is used to CHANGE the password of exi...

Which option in the Postfix configuration makes Postfix pass email to external destinations to another SMTP-server? (Specify ONLY the option name without any values.)

Which Linux user is used by vsftpd to perform file system operations for anonymous FTP users? A. The Linux user which runs the vsftpd process B. The Linux user that owns the root FTP directory ser...

A zone file contains the following lines: $ORIGIN example.com host2.example.org. IN A 198.51.100.102 and is included in the BIND configuration using this configuration stanza: zone "example....