Shell Programming and Scripting

#funame -n

# thishost=a1bc11
# basehost=${thishost%[0-9]}
# thissuffix=${thishost##*[a-z][0-9]}
# thatsuffix=$((3-$thissuffix))
# thathost=${basehost}${thatsuffix}
# echo $thathost
a1bc12
# thishost=a1bc12
# basehost=${thishost%[0-9]}
# thissuffix=${thishost##*[a-z][0-9]}
# thatsuffix=$((3-$thissuffix))
# thathost=${basehost}${thatsuffix}
# echo $thathost
a1bc11

root@carp # X=voms21                                  
root@carp # numofchar=${#X}                           
root@carp # numofcharminus1=`expr $numofchar "-" 1`   
root@carp # Y=`echo "$X" | cut -c1-${numofcharminus1}`
root@carp # Z=`echo "$X" | cut -c${numofchar}`        
root@carp # T=`expr 3 "-" $Z`                         
root@carp # echo $Y$T                                 
voms22

root@carp # cat modif
numofchar=${#X}
numofcharminus1=`expr $numofchar "-" 1`
Y=`echo "$X" | cut -c1-${numofcharminus1}`
Z=`echo "$X" | cut -c${numofchar}`
T=`expr 3 "-" $Z`
echo $Y$T

root@carp # X=voms21
root@carp # ./modif
cut: invalid range specifier
cut: no list specified
expr: syntax error

root@carp #