otangle: 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/otangle - from package: texlive

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

On Debian possible default full paths are:

/usr/bin/otangle - from package: texlive-binaries

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

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