问题：
在将texlive2013.iso挂载到/mnt后，进入/mnt目录
$ cd /mnt
$ sudo ./install-tl
之后遇到如下错误：
Can't locate Digest/MD5.pm in @INC (you may need to install the Digest::MD5 module) (@INC contains: ./tlpkg /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at tlpkg/TeXLive/TLUtils.pm line 201.
BEGIN failed--compilation aborted at tlpkg/TeXLive/TLUtils.pm line 201.Compilation failed in require at ./install-tl line 53.
BEGIN failed--compilation aborted at ./install-tl line 53.
解决方法：
摸索了一会，发现这样可以解决问题。
$ sudo dnf install perl-Digest-MD5
Ubuntu貌似是：
$ sudo apt-get install libdigest-perl-md5-perl