I don't know what this sudo is and I don't know what third party repositories are. It's taken me 20 minutes to post this because Firefox keeps crashing and when I try Chromium I get "Aw Snap" crashes constantly.
I tried adding "sudo" to command in terminal and got this:
bmacbn@bmacbn-Latitude-D520:~$ sudo apt-get install -f[sudo] password for bmacbn:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following packages were automatically installed and are no longer required:
thunderbird-globalmenu language-pack-kde-en gir1.2-ubuntuoneui-3.0
language-pack-kde-en-base kde-l10n-engb libubuntuoneui-3.0-1
linux-headers-3.5.0-23 linux-headers-3.5.0-23-generic amarok-help-en
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
The following NEW packages will be installed:
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
Need to get 0 B/6,508 B of archives.
After this operation, 92.2 kB of additional disk space will be used.
Do you want to continue [Y/n]? y
(Reading database ... 313212 files and directories currently installed.)
Unpacking libwayland-egl1-mesa-lts-trusty (from .../libwayland-egl1-mesa-lts-trusty_10.1.3-0ubuntu0.1~precise1_i386.deb) ...
xz: (stdin): Compressed data is corrupt
dpkg-deb (subprocess): subprocess data returned error exit status 1
dpkg-deb: error: subprocess <decompress> returned error exit status 2
dpkg: error processing /var/cache/apt/archives/libwayland-egl1-mesa-lts-trusty_10.1.3-0ubuntu0.1~precise1_i386.deb (--unpack):
short read on buffer copy for backend dpkg-deb during `./usr/share/doc/libwayland-egl1-mesa-lts-trusty/copyright'
No apport report written because MaxReports is reached already
Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)