matt posteets tagged linux  [ Profile ]

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  1. 4 months ago
    -e filename
        True if filename exists.
    -d filename
        True if filename exists and is a directory.
    -f filename
        True if filename exists and is a plain file.
    -h filename
        True if filename exists and is a symbolic link.
    -r filename
        True if filename exists and is readable.
    -w filename
        True if filename exists and is writable.
    -n string
        True if the length of string is non-zero.
    -z string
        True if the length of string is zero.
    string
        True if string is not the empty string.
    s1 = s2
        True if the strings s1 and s2 are identical.
    s1 != s2
        True if the strings s1 and s2 are not identical.
    n1 -eq n2
        True if the numbers n1 and n2 are equal.
    n1 -ne n2
        True if the numbers n1 and n2 are not equal.
    n1 -gt n2
        True if the number n1 is greater than n2.
    n1 -ge n2
        True if the number n1 is greater than or equal to n2.
    n1 -lt n2
        True if the number n1 is less than n2.
    n1 -le n2
        True if the number n1 is less than or equal to n2.
    ! expression
        Negates expression, that is, returns true iff expression is false.
    expr1 -a expr2
        True if both expressions, expr1 and expr2 are true.
    expr1 -o expr2
        True if either expression, expr1 or expr2 is true.
    ( expression )
        True if expression is true. This allows one to nest expressions.

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