fc-solve: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/fc-solve - from package: freecell-solver-bin

You may install the required package with command apt-get install {package}

Error in other languages:
fc-solve: bevel nie gevind nie
fc-solve: comandă negăsită
fc-solve: comando não encontrado
fc-solve: commande introuvable
fc-solve: command not found
fc-solve: käsku ei ole
fc-solve: không tìm thấy lệnh
fc-solve: komanda nerasta
fc-solve: Kommando nicht gefunden.
fc-solve: kommandot finns inte
fc-solve: komut yok
fc-solve: nie znaleziono polecenia
fc-solve: níor aimsíodh an t-ordú
fc-solve: no se encontró la orden
fc-solve: no s'ha trobat l'ordre
fc-solve: opdracht niet gevonden
fc-solve: parancs nem található
fc-solve: perintah tidak ditemukan
fc-solve: príkaz nenájdený
fc-solve: příkaz nenalezen
fc-solve: команда не найдена
fc-solve: командата не е открита
fc-solve: 命令找不到
fc-solve: コマンドが見つかりません