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Regarding the security aspect, what is probably meant by this is that $@ can be expanded into separate fields each within double quotes, thus protecting the fields from unwanted interpretation by the...

When I call this file

#!/bin/bash

echo -e "With \$* I have to chose all or nothing"
echo "ALL"
for i in "$*" ; do
echo -e "\t$i"
done
echo "NOTHING"
for i in $* ; do
echo -e...

From one example of man ls , a man page which you may wish to read on your system.

-f Interpret each argument as a directory and list the name
found in each slot. ...

Quick answer in Bourne-type shells.
This is what the administrator set for your terminal.
echo $TERM

Then, try:

$ str=".a/b/c/done"
$ echo "${str##*/}"
done
Regards,
Birei

Mostly Shell: Count the number of "/" characters, prepend the number to the line, sort, remove the prepended field.
#!/bin/ksh
cat filename.txt | while read line
do
count=`echo...

find -atime +30 -type f >olds