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Command exit codes

wget www.ipcop.org

gives

.--2015-07-21 20:46:41--  http://www.ipcop.org/
Resolving www.ipcop.org (www.ipcop.org)... 216.34.181.97
Connecting to www.ipcop.org (www.ipcop.org)|216.34.181.97|:80... connected.
HTTP request sent, awaiting response... 503 Service Unavailable
2015-07-21 20:46:41 ERROR 503: Service Unavailable.
echo $?

gives

8

Now with no output so it can be used in a script

wget www.ipcop.org 1> /dev/null 2> /dev/null; echo $?

gives

8
wget www.ipcop.org  > /dev/null 2&>1; echo $?

gives

4

Why?


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command_exit_codes.txt · Last modified: 21-07-2015 23:05 by wim