「bc」是Linux作業系統內建用來進行任意精度計算的指令，可以透過撰寫簡單且類似C語言的數學腳本來計算數學。例如輸入「scale=4;9/8」，可以得到「1.1250」的輸出。在Rust程式語言中，也可以利用「bc」來協助我們計算複雜的數學。

JSON(JavaScript Object Notation)為一種數據交換結構，相比XML，JSON的語法顯得更為輕巧，能夠大大地減少數據交換時所要傳遞的資料量。現在許多網路服務的API(Application Programming Interface)是使用JSON格式的文字訊息來進行資料交換。絕大部分的企業提供的API所傳回的JSON訊息，沒有使用空格字元或是換行字元來進行排版，為得就是...

BitTorrent(簡稱BT)是分享檔案專用的P2P網路協定，其特色在於下載同一個檔案的使用者愈多(種子數愈多)，該檔案的下載速度就愈快。這是因為每位下載檔案的使用者都必須同時分享自己已經下載好的組塊(chunk)給其它有需要的使用者來下載。也就是說，若我們可以得知愈多下載該檔案的使用者，理論上就可以有愈多的檔案區塊來源，進而加快下載的速度。至於我們要如何知道有哪些使用者正在使用BT下載該檔案呢...

Which of the following Samba services handles the membership of a file server in an Active Directory domain? A. winbindd B. nmbd C. msadd D. admemb E. samba

Which of these tools, without any options, provides the most information when performing DNS queries? A. dig B. nslookup C. host D. named-checkconf E. named-checkzone

Which of the following statements is true regarding the NFSv4 pseudo file system on the NFS server? A. It must be called /exports B. It usually contains bind mounts of the directory trees to be ex...

Which doveadm sub-command displays a list of connections of Dovecot in the following format? (Specify ONLY the command without any parameters.) username # proto (pids) (ips) usera ...

Which OpenLDAP client command can be used to change the password for an LDAP entry? (Specify ONLY the command without any path or parameters.)

After running ssh-keygen and accepting the default values, which of the following files are changed or created? (Choose two.) A. ~/.ssh/id_rsa.key B. ~/.ssh/id_rsa.pub C. ~/.ssh/id_rsa.prv D. ~/...

Which of the following options are valid in /etc/exports? (Choose two.) A. rw B. ro C. rootsquash D. norootsquash E. uid