thesaurusTranslate: 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/thesaurusTranslate - from package: libbiblio-thesaurus-perl

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

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