Ubuntu32bit4 GB memory problems and solutions

The new system memory is upgraded from 2 GB to 4 GB, but only 3291 MB can be seen when you use the command, as shown below: $ free-mtotal & n

The new system memory is upgraded from 2 GB to 4 GB, but only 3291 MB can be seen when you use the command to view it, as shown below:

1. $ Free-m
2. Total used free shared buffers cached
3. Mem:32918012489095342
4. -/+ Buffers/cache:3632927
5. Swap:190601906

Check it to find out that the default 32-bit Linux system can only recognize 3291 (3 GB) memory, so if you want to use a 32-bit system with a memory larger than 3 GB, to install Physical Address Extension (PAE), perform the following steps on Ubuntu:

1. $ Sudo apt-GetUpdate
2. $ Sudo apt-GetInstall linux-headers-server linux-image-server linux-server
3. $ Sudo reboot

After the system is restarted, check the memory

1. $ Free-m
2. Total used free shared buffers cached
3. Mem:3862373212901271149
4. -/+ Buffers/cache:24551406
5. Swap:57201705550