riable _LETTERS_ONLY.
A test on the variable is then carried out. If it holds any value then it's an error, but if it holds no value then it's OK. A return code is then executed based on ... users who is logged in, don't you just hate it when you have forgotten the person's full name? Many a time I have seen users locking up a process, but their user ID mea... e MAX characters permitted which in this case is ten; the break command then lets it drop out of the loop.
Using the above pie... rst character would be chopped off !
Months
When generating reports or creating screen displays, it is sometimes convenient to the progr
) string variable.
if [ -z "$String" ]
then
echo "\$String is null."
else
ech... rackets. Using an unquoted string with ! -z, or even just the unquoted string alone within test bracke... tegers or strings.
# There is some blurring between the arithmetic and string comparisons,
#+ since B... n advised, however.
echo
if [ "$a" -ne "$b" ]
then
echo "$a is not equal to $b"
echo "(arithmeti
