Proces the content of /etc/passwd file field by field
Here IFS sets the “internal field delimiter” to “:”, but only inside the while loop. You must NOT reset it to the original value.
while IFS=: read name passwd uid gid fullname ignore
do
echo "$name ($fullname)"
done < ${TMP} # I/O redirection.
Do some actions for secrtain files:
Comparison with shell
If you read “man test” you’ll note that the “=” comparison operator is for strings, while “-eq” is used for numerical comparisons.
If you want to get really fancy, you can also write your code as (not tested, so try at your own risk):
[ $choice -eq 1 -a $choice1 -eq 0 ] && while [ $target -ne 2 ] ; do
References
- http://www.linuxtopia.org/online_books/advanced_bash_scripting_guide/index.html
- Advanced Bash-Scripting Guide (also in PS, PDF, HTML). URL: http://www.tldp.org/LDP/abs/
Some ‘bash’ Magic