- Linux command exit status
Using echo $? to get last executed command exit status
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$ wget https://www.google.com
$ echo $?
0
- Call a host that does not exists
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$ wget http://www.dummybla.com/
--2020-09-23 19:00:55-- http://www.dummybla.com/
Resolving www.dummybla.com (www.dummybla.com)... failed: nodename nor servname provided, or not known.
wget: unable to resolve host address ‘www.dummybla.com’
$ echo $?
4
- Call a host that does not exists and force wget exit status as true
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$ wget http://www.dummybla.com/ || true
--2020-09-23 19:00:55-- http://www.dummybla.com/
Resolving www.dummybla.com (www.dummybla.com)... failed: nodename nor servname provided, or not known.
wget: unable to resolve host address ‘www.dummybla.com’
$ echo $?
0