n the left side of the $ key on the keyboard and operates from the left. The % key is on the right of the $ key and operated from the right.
These operators can be used t... ot set
== NOTE ==
The colon (:) in the above operators can be omitted. Doing so changes the behavior of the operator to test only for existence of the variable. T... ents. You'll also see many uses of sed and awk or perl -e to perform simple string manipulations.
Often these mac... ameters are valid filenames or paths. They simple perform simple string operations on a single argument. You shouldn't use wil
e Bash variables are not strongly typed.
# Bash permits integer operations and comparisons on variables
#+ whose value... # This works fine.
# The [ ... ] test operator alone detects whether the string is null.
# H... true.
These are similar to the Bash comparison operators && and ||, used within double brackets.
<co... ondition1 && condition2 ]]</code>
The -o and -a operators work with the test command or occur within s
