$ echo {{1,2,3},1,2,3}
1 2 3 1 2 3
$ echo {{1,2,3}1,2,3}
11 21 31 2 3
DATE
Set date
# date -s "2009-12-31 12:59:59"
$ date +%d-%b-%Y
30-Jul-2006
FIND
Find any text files which other user can read:
find . -perm -o=r -iname "*.txt"
Find any text files which other user can read, then chmod them to o-rwx:
find ~ -iname "*.txt" -perm -o=r -exec chmod o-rwx '{}' \;
Find any files which > 50MB:
find . -size +50M
RPM MANAGER
$ rpm -ql $(rpm -qa | grep httpd)
$ today=`ls | grep txt`
$ stat today
$ find / -name foo