apt-get install unzip get strange error

hello,

i am trying to install unzip and get this error:

root@bo:~# apt-get install unzip Reading package lists… Done Building dependency tree
Reading state information… Done Suggested packages: zip The following packages will be upgraded: unzip 1 upgraded, 0 newly installed, 0 to remove and 54 not upgraded. 1 not fully installed or removed. Need to get 0 B/193 kB of archives. After this operation, 386 kB of additional disk space will be used. (Reading database … dpkg: warning: files list file for package `unzip’ missing, assuming package has no files currently installed. (Reading database … 219960 files and directories currently installed.) Preparing to replace unzip 6.0-4ubuntu2.5 (using …/unzip_6.0-4ubuntu2.5_amd64.deb) … Unpacking replacement unzip … dpkg: unrecoverable fatal error, aborting: fork failed: Cannot allocate memory E: Sub-process /usr/bin/dpkg returned an error code (2)

Please suggest to fix that issue.

thanks, ThanhTruong