cscope: 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/cscope - from package: cscope

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

On Debian possible default full paths are:

/usr/bin/cscope - from package: cscope

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

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