Learn Ubuntu every day

• Get the number of CPUs

cat /proc/cpuinfo | grep -c processor

• Get the URL of package to be installed from Ubuntu

sudo apt-get -qq --print-uris install ssh | cut -d\'  -f2 # Get the URL of "ssh" package

• Check your system is 32-bit or 64-bit

getconf LONG_BIT
64               # 64 means 64-bit, 32 means 32-bit

• Check release information of Ubuntu

lsb_release -ds  # Check release version
lsb_release -sc  # Check release code
lsb_release -a    # Check all information of release