wgsim_eval.pl: 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/wgsim_eval.pl - from package: samtools

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

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