command not found:pcalc code example

Example 1: command not found: nvm

# Check your .bash_profile, .zshrc, or .profile file.
# You most likely had a problem during the installation.
# You should have the following at the end of one of those files.
[[ -s $HOME/.nvm/nvm.sh ]] && . $HOME/.nvm/nvm.sh  # This loads NVM

Example 2: rec: command not found

$ sudo apt-get install sox