11 comment

1. Thanks!

2. Please I want to y1, y2 and y3 to have values piped in by the pipe (|) and read to read from the file and asign them to the variables but

   export tukur=2
   test is a file contain 3 columns say: aa bb cc
   after excuting the following command y1, y2, y3 dont contain anythin pls could someone help?

   tail -n +$tukur home/tukur/test | read -r y1 y2 y3

   Thank you,
   Tukur Dan-Asabe.

3. Tukur,

   Assuming that your file.txt is as follows:
   val1 val2 val3

   Here is a shell script:
   
   #!/bin/sh
   while read line
   do
   # store field 1
   F1=$(echo $line|cut -d” ” -f1)
   # store field 2
   F2=$(echo $line|cut -d” ” -f2)
   # store field
   F3=$(echo $line|cut -d” ” -f3)
   echo $F1 ” ” $F2 ” ” $F3
   done < file.txt

   Var $F1 $F2 and $F3 stores the value. If you need more help try out shell scripting forum @ http://forum.cyberciti.biz/

4. Thanks nixcraft,

5. Unfortunately, read -s only works if the first line of your script sets the shell to bash. Tested in ubuntu.

   IF THIS does work
   #!/bin/sh

   set to
   #!/bin/bash

6. Thank for this post, very interesting.

7. Hi Vivek,

   How to make a one liner that can implement the prompt script to run multiple times?
   eg. the simplest one i can think of:

   i have one user list, name it as userlist.txt with content as below:
   mary:mary@mail.com
   kent:kent@mail.com
   judy:judy@mail.com
   ……

   with a script that used to reset single user password, resetpwd.sh
   #!/bin/bash

   user=$1

   read -p “reset user password (y/n)” yn

   case $yn in
   y|Y)
   echo “plsresetlater” | passwd –stdin $user &> /dev/null;;
   n|N)
   echo “user password did not change”;;
   esac

   then run the one liner by piping all the username to the resetpwd.sh; see output:

   reset user password (y/n) y #user mary
   reset user password (y/n) n #user kent
   user password did not change
   reset user password (y/n) n #user judy
   user password did not change
   ……

   i have tried the awk; not working
   awk -F “:” ‘{print $1}’ userlist.txt | while read users; do resetpwd.sh $users; done

8. hi guys,
   if in the middle of execution of script ,
   some process asked for some input from keyboard . How can i provide that input from the script?

   1. you may try the following (i am using them in SOLARIS)
      #
      echo “enter some_input”
      read some_input
      #
      # to display entered input and then to abort or proceed
      echo “entered some_input is $some_input. Press ENTER key to continue or CONTROL-C to abort”
      read
      #

9. I took your script and made it fully automated:

   if [[ $(whoami) == 'root' ]]; then
     USER=johndoe
     read -s -p 'Enter Password:' PASSWORD
     HOSTNAME=10.0.1.16
     AFPSHARE="TM_MBP13"
     TM_NAME=$(hostname -s)
   
     # Don't change these ...
     MOUNT=/Volumes/TimeMachine
     SPARSEBUNDLE=$MOUNT/${TM_NAME}.sparsebundle
     PLIST=${SPARSEBUNDLE}/com.apple.TimeMachine.MachineID.plist
   
     echo "Disabling TimeMachine"
     tmutil disable
   
     echo "Unmounting ${AFPSHARE}"
     while mount | grep ${AFPSHARE} > /dev/null; do  mount | grep ${AFPSHARE} | awk '{print $3}' | xargs -n1 -I{} umount -f {}; done  
   
     echo "Mounting volume"
     mkdir $MOUNT
     mount_afp afp://${USER}:${PASSWORD}@${HOSTNAME}/${AFPSHARE} ${MOUNT}
   
     echo "Changing file and folder flags"
     chflags -R nouchg "${SPARSEBUNDLE}"
   
     echo "Attaching sparse bundle"
     DISK=$(hdiutil attach -nomount -readwrite -noverify -noautofsck "${SPARSEBUNDLE}" | grep 'Apple_HFS' | awk '{ print $1 }')  
   
     echo "Repairing volume"
     diskutil repairVolume ${DISK}
     /sbin/fsck_hfs -fry ${DISK}
   
     echo "Fixing Properties"
     cp "${PLIST}" "${PLIST}.backup"
     sed -e '/RecoveryBackupDeclinedDate/{N;d;}'   \
         -e '/VerificationState/{n;s/2/0/;}'       \
         "${PLIST}.backup" \
          > "${PLIST}"
   
     echo "Unmounting volumes"
     hdiutil detach ${DISK}
     umount ${MOUNT}
   
     echo "Enabling TimeMachine"
     tmutil enable
   
     echo "Starting backup"
     tmutil startbackup
     
   else
     echo Please run this script as root.
   fi
   

10. Thanks a lot~

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