checkbashisms: 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:

/usr/bin/checkbashisms - from package: rpmdevtools

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

On Debian possible default full paths are:

/usr/bin/checkbashisms - from package: devscripts

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

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