sqlsharp: 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/sqlsharp - from package: mono-data

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

On Debian possible default full paths are:

/usr/bin/sqlsharp - from package: mono-devel

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

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