showchar: 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/showchar - from package: psutils

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

On Debian possible default full paths are:

/usr/bin/showchar - from package: psutils

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

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