softlimit: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/softlimit - from package: daemontools

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