Help With Script

Shell Programming and Scripting
1

I need a bash script that every day at 4 am verifys the home user directory for the next entrys

  • Registers all user action in root/login/checl.log
  • Excluds UID inferior then 500 and that home/dev/null
  • Create's the the user home directory if it does not exist
  • guarantees that the the home directory belongs to the right users
  • removes all premissions for users other
  • if the files /WWW/index.html does not existe create it

if anybody can help thanks

2

While we try and help as much as possible, we won't do your work for you. Show what you've got so far & where you're stuck, and we'll do our best.

3

I know that I have to use crone but dont know what commands to use in the script
thanks anyway

4

Well then, here are some commands you might want to take a look at:

  • For filtering out the users: awk
  • Creating the home directory: mkdir -p
  • Correcting ownership: chown
  • Removing permissions for everyone else: chmod
  • Testing for file existence: test -e
  • Creating a file: echo or cat or cp it from somewhere
  • Doing that for all users in a file: while read
5

Thanks

---------- Post updated 15-01-10 at 12:08 AM ---------- Previous update was 14-01-10 at 04:54 PM ----------

#! /bin/bash

infoUsers=$(cat /etc/passwd | cut -d':' -f1,3,6) 
for infoUser in $infoUsers
do 
	userName=$(echo $infoUser | cut -d':' -f1)
	uid=$(echo $infoUser | cut -d':' -f2)
	uDir=$(echo $infoUser | cut -d':' -f3)
	idGroup=$(cat /etc/passwd | cut -d':' -f4)
	if [ '"$uid"  -ge "500" && ! $uDir -eq "/dev/null"' ];
	then
		if [ ! -d $uDir ]
		then
			$(mkdir $uDir)
		fi
		$(chown $userName $uDir)
		groupName=$(cat /etc/group | grep $idGroup | cut -d':' -f1)
		$(chgrp $groupName $uDir)
		$(chmod o-rwx $uDir)
		if [ ! -f "$uDir/www/index.html" ]
		then
			$(echo "Welcome!" > "$uDir""/www/index.html")
			$(chmod o-w+rx "$uDir""/www/index.html")
		fi
	fi
done

for file in /root/logins/login*
do
	echo "$file" >> "/root/logins/check.log"
	cat "$file" >> "/root/logins/check.log"
done

well this is what a got, but when I was going to test it this script bust up my users or something and my linux got **** up. What you think was the problem

6

What happened to your system? Can you describe any effects, or post any output?

Where corrections were applied:

  • Old code is in red
  • New code is in Green
  • Comments are in Blue
#! /bin/bash

infoUsers=$(cat /etc/passwd | cut -d':' -f1,3,6)
# If you want the group, too, then you'll have to get it here, not inside the loop
infoUsers=$(cat /etc/passwd | cut -d':' -f1,3,6,4)

for infoUser in $infoUsers
do 
	userName=$(echo $infoUser | cut -d':' -f1)
	uid=$(echo $infoUser | cut -d':' -f2)
	uDir=$(echo $infoUser | cut -d':' -f3)

	idGroup=$(cat /etc/passwd | cut -d':' -f4)
# See above comment. Better to get the group outside the loop, not inside
	idGroup=$(echo $infoUser | cut -d':' -f4)

	if [ '"$uid"  -ge "500" && ! $uDir -eq "/dev/null"' ];
# As soon as you surround a variable or constant with quotes it becomes a
string, which isn't suitable for testing with -gt/-lt
# Also, you don't have to quote the whole test expression
	if [ $uid -ge 500 && ! "$uDir" -eq "/dev/null" ];

	then
		if [ ! -d $uDir ]
		then

			$(mkdir $uDir)
# No need to capture the output of mkdir here using $()
			mkdir $uDir

		fi

		$(chown $userName $uDir)
#Again, no need to capture
		chown $userName $uDir

# This is optional. You can change the ownerships by ID just as well
		groupName=$(cat /etc/group | grep $idGroup | cut -d':' -f1)

		$(chgrp $groupName $uDir)
		$(chmod o-rwx $uDir)
#Again, no need to capture
		chgrp $groupName $uDir
		chmod o-rwx $uDir

		if [ ! -f "$uDir/www/index.html" ]
		then
			$(echo "Welcome!" > "$uDir""/www/index.html")
			$(chmod o-w+rx "$uDir""/www/index.html")
		fi
	fi
done

for file in /root/logins/login*
do
	echo "$file" >> "/root/logins/check.log"
	cat "$file" >> "/root/logins/check.log"
done
7

well my sistem got all the test replaced by xxxxxx and [][][][][][][] then I restarted it but it will not boot now so I installed a new one, i'm running this on a virtual machine. Thanks for every thing

8

well I cant get this to work, it never enters the first if because I need it to get the UserId line by line and not all at once.
Can anyboady help ???

---------- Post updated at 07:18 PM ---------- Previous update was at 07:08 PM ----------

#!/bin/bash


userinfo=`cat /etc/passwd | cut -d':' -f1,3,4,6`

for user in userinfo 
do
	UserN=`echo "$userinfo" | cut -d':' -f1`
	UserId=`echo "$userinfo" | cut -d':' -f2`
	UserDir=`echo "$userinfo" | cut -d':' -f4`
	UserG=`echo "$userinfo" | cut -d':' -f3`

	if [ $UserId -ge 501 && ! "$UserDir" -eq "/dev/null" ];then    
		
	    if [ ! -d "$UserDir" ];then
	    mkdir $UserDir
	    echo "---Directorio do $UserN criado com sucesso---"
	    fi
	    #chown $UserN $UserDir
	    
            #GroupN=`cat /etc/group | grep $UserG | cut -d':' -f1`
	    #chgrp $GroupN $UserDir
            #chmod o-rwx $UserDir
	    
	    #if [ ! -f "$UserDir/www/index.html" ];then
	    #    $(echo "Hello está no ficheiro Index.html" > "$UserDir""/www/index.html")
	    #	$(chmod o-w+rx "$UserDir""/www/index.html")
	    #fi
	fi
done
9

Replace this:

if [ $UserId -ge 501 && ! "$UserDir" -eq "/dev/null" ];then

with:

if [ $UserId -ge 501 ] && [ "$UserDir" != "/dev/null" ];then