arch=uname -m

• > file redirects stdout to file
• 1> file redirects stdout to file
• 2> file redirects stderr to file
• &> file redirects stdout and stderr to file
• command > /dev/null 2>&1 & run command in background, discard stdout and stderr
• command >> /path/to/log 2>&1 & run command and redirect stdout and stderr to log file. >/dev/null 2>&1 means redirect stdout to /dev/null AND stderr to the place where stdout points at that time
• yourcommand 2>&1 > /dev/null In this case stderr is redirected to stdout (e.g. your console) and afterwards the original stdout is redirected to /dev/null

nohup

فرمان را اجرا می‌کند و خروجی را در nohup.out می‌ریزد.

nohup yourcommand &