iconv: 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/iconv - from package: glibc-common

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

On Debian possible default full paths are:

/usr/bin/iconv - from package: libc-bin

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

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