cstr: 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/cstr - from package: liwc

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

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