sslclient: 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/sslclient - from package: dacs

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

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