install-info: 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/install-info - from package: info

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

On Debian possible default full paths are:

/usr/bin/install-info - from package: install-info

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

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