couchdb-dump: command not found

Have You tried accessing the binary with the full path?

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/couchdb-dump - from package: python-couchdb

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