for interfacefile in `ls /etc/sysconfig/network-scripts/ifcfg-eth*`
I have following for loop in my shell script. now
ls /etc/sysconfig/network-scripts/ifcfg-eth*
/etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth1
/etc/sysconfig/network-scripts/ifcfg-eth0.0 /etc/sysconfig/network-scripts/ifcfg-eth1:1
the problem is I want to grep only normal Ethernets... not like ifcfg-eth0.0 and ifcfg-eth1:1
this type of comma as well as DOT separated strings.
Wouldn't something like ls /etc/sysconfig/network-scripts/ifcfg-eth[0-9] suffice?
ifcfg-eth[0-9] instead. Otherwise it loops through all numbers. With [ ] it just looks for files within this pattern.You can do it like this:
# enable extender pattern matching
shopt -s extglob
for interfaceFile in /etc/sysconfig/network-scripts/ifcfg-eth+([0-9])
Note that you don't need ls here. The shell will expand the filenames.
A portable way for POSIX shells:
for if in /etc/sysconfig/network-scripts/ifcfg-eth*; do
[ -e "${if}" ] || continue
if=${if##*/ifcfg-}
case ${if#eth} in
*[!0-9]*) continue ;;
esac
echo "${if}"
done
This will give you just the interface names (e.g. eth0, eth1, ...), if you are really after the full paths to the config files adapt the variable names accordingly.
ls.