c-icap-mkbdb: 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/c-icap-mkbdb - from package: c-icap

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

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