fsck.jfs: 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 CentOS possible default full paths are:

/sbin/fsck.jfs - from package: jfsutils

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/sbin/fsck.jfs - from package: jfsutils

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

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