Testa om variabel är satt: Difference between revisions
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Linuxwiki>Wikiadmin Skapade sidan med '== Testa om variabel är satt i Bash == Källa: http://www.bo.infn.it/alice/alice-doc/mll-doc/linux/scripts/node5.html Exempel verify if the PRINTER environment variable is...' |
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''' echo "$PRINTER is set"''' | ''' echo "$PRINTER is set"''' | ||
'''fi''' | '''fi''' | ||
[[Kategori:bash]] | |||
Latest revision as of 21:53, 11 May 2026
Testa om variabel är satt i Bash
Källa: http://www.bo.infn.it/alice/alice-doc/mll-doc/linux/scripts/node5.html
Exempel
verify if the PRINTER environment variable is set
$ cat ~/tools/exsh/isset.sh
#!/bin/bash
#
if test "${PRINTER+set}" != set ; then
echo "$PRINTER is not set"
else
echo "$PRINTER is set"
fi