strace: 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/strace - from package: strace

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

On Debian possible default full paths are:

/usr/bin/strace - from package: strace

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

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