FTP servers

Q. How do I install Ubuntu ftp service or server? A. Ubuntu Linux comes with various ftp servers to setup FTP service such as: => proftpd – Versatile, virtual-hosting FTP daemon => vsftpd – The Very Secure FTP Daemon => ftpd – FTP server => wu-ftpd – powerful and widely used FTP server => wzdftpd [...]

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Because of security issues I would like to change the vsftpd server tcp port # 21. How do I configure vsftpd to use another port instead of the default TCP port 21? How to change vsftpd ftp port number in Linux or Unix?

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Q. What happens when a hard disk fails in RAID 5? How many hard drive can fail in RAID 5?

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