coreutils: Numeric tests
16.3.5 Numeric tests
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Numeric relational operators. The arguments must be entirely numeric
(possibly negative), or the special expression ‘-l STRING’, which
evaluates to the length of STRING.
‘ARG1 -eq ARG2’
‘ARG1 -ne ARG2’
‘ARG1 -lt ARG2’
‘ARG1 -le ARG2’
‘ARG1 -gt ARG2’
‘ARG1 -ge ARG2’
These arithmetic binary operators return true if ARG1 is equal,
not-equal, less-than, less-than-or-equal, greater-than, or
greater-than-or-equal than ARG2, respectively.
For example:
test -1 -gt -2 && echo yes
⇒ yes
test -l abc -gt 1 && echo yes
⇒ yes
test 0x100 -eq 1
error→ test: integer expression expected before -eq