imsettings-list: 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/imsettings-list - from package: imsettings

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

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