coqide: 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 Debian possible default full paths are:

/usr/bin/coqide - from package: coqide

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

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