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Check two conditions in bash ? [solved]
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[ condition1 ] && [ condition2 ] && echo "Good" || echo "Bad"
Explanation
[
is an alias for the programtest
, so you can callman test
for more info.&&
is bash syntax for conjunction. In A && B, B will only be called if A returned a exit code >0 (error). You can callman bash
for more info.||
is bash syntax for disjunction. In A || B, B will only be called if A returned exit code =0 (success).true
andfalse
are programs that just return exit codes 0 respectively 1.Never use
a && b || c
. It is not the same asif a; then b; else c; fi
: whena
succeeds butb
fails, it will run bothb
andc
.I would not bother with
[
unless you absolutely need compatibility with non-bash shells.