pcb-lesstif: 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/pcb-lesstif - from package: pcb-lesstif

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

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