Hi Guys,

Im currently running unix aix using korn shell script.

Actually im in the process of studying some unix commands, just need your help to validate these commands, i have google i though, just need confirmation

while [ $var -lt 1 ]
Checks variable if it is less than 1 ?

if [ $var -ge 6 ]
Checks if its greater than 6 ?

if [ -e $1 ]
If the files specified in $1 Exists ?

if [ log1.log -nt log2.log ]
Checks if log1 modified date is less than log2 modified date?

script.sh >> script.log 2>&1
Appends output of script.sh to script.log and redirect standard error messages to the path specified in first parameter ?

The thing is that its easy to find commands reference in unix, commands like rm, ps -ef, grep, sed can be easily google, but certain certain commands like
-e or -nt , its quite difficult to find what it actually does, Im not sure if this is commands or just some attributes/flags. Its quite difficult to find reference on this type of attributes/flags

When in doubt, write and test a short script to confirm your understanding.

-PatP

thanks pat, i was browsing through one of the forums and found the link below, it contains some of the most frequently used file attributes and arithmetic operators

> http://www.metalshell.com/view/source/70/