You need to install the 32 bit version of standard c++ library.
In case you have a 64 bit linux system installed use one of the following command, depending on your distribution:
Quote:
Originally Posted by TF2 Wiki
On 64-bit CentOS run:
# yum install ncompress libstdc++.i686 libgcc.x86_64 libgcc.i686 glibc.i686 zlib.i686 ncurses-libs.i686
On 64-bit Debian/Ubuntu/Linux Mint run:
# sudo apt-get install lib32gcc1 lib32z1 lib32ncurses5 lib32bz2-1.0
For x86_64 Arch Linux run (you need to have multilib repositories enabled):
# pacman -Syy lib32-gcc-libs
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