gsch2pcb: command not found

Have You tried accessing the binary with the full path?

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/gsch2pcb - from package: geda-utils

You may install the required package with command apt-get install {package}
Error in other languages:
gsch2pcb: bevel nie gevind nie
gsch2pcb: comandă negăsită
gsch2pcb: comando não encontrado
gsch2pcb: commande introuvable
gsch2pcb: command not found
gsch2pcb: käsku ei ole
gsch2pcb: không tìm thấy lệnh
gsch2pcb: komanda nerasta
gsch2pcb: Kommando nicht gefunden.
gsch2pcb: kommandot finns inte
gsch2pcb: komut yok
gsch2pcb: nie znaleziono polecenia
gsch2pcb: níor aimsíodh an t-ordú
gsch2pcb: no se encontró la orden
gsch2pcb: no s'ha trobat l'ordre
gsch2pcb: opdracht niet gevonden
gsch2pcb: parancs nem található
gsch2pcb: perintah tidak ditemukan
gsch2pcb: príkaz nenájdený
gsch2pcb: příkaz nenalezen
gsch2pcb: команда не найдена
gsch2pcb: командата не е открита
gsch2pcb: 命令找不到
gsch2pcb: コマンドが見つかりません