root@ubuntu:/# apt-get install --reinstall linux-image-generic
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  chromium-codecs-ffmpeg-extra libkeybinder0 linux-headers-3.19.0-15 linux-headers-3.19.0-15-generic
  linux-image-3.19.0-15-generic linux-image-extra-3.19.0-15-generic
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 0 not upgraded.
Need to get 0 B/2,318 B of archives.
After this operation, 0 B of additional disk space will be used.
E: Can not write log (Is /dev/pts mounted?) - posix_openpt (2: No such file or directory)
(Reading database ... 242228 files and directories currently installed.)
Preparing to unpack .../linux-image-generic_3.19.0.26.25_amd64.deb ...
Unpacking linux-image-generic (3.19.0.26.25) over (3.19.0.26.25) ...
Setting up linux-image-generic (3.19.0.26.25) ...
root@ubuntu:/#