Update user password for same user under many CentOSes

chpasswdBatch.bash

#!/bin/bash

#. update passwrods in batch mode
#. root as yourself

currDir=$(dirname $(readlink -f "$0"))
#echo $currDir
source ${currDir}/commonFuncs.bash

user2change="$1"
hostsCfg=~/chpasswdHosts
currentPwdFile=~/chpasswdOld
newPwdFile=~/chpasswdNew


function usage()
{
        local hostF=$1
        local oldPWDf=$2
        local newPWDf=$3
        redAlert "Usage: $0 <userName2change>"
        redAlert "\n$0 reads:\n\n${hostF} for hosts,\n${oldPWDf} for OLD pwd,\n${newPWDf} for NEW pwd to change to.\
n"
}

if [ ! -f "${hostsCfg}" ] || [ ! -f "${currentPwdFile}" ] || [ ! -f "${newPwdFile}" ]; then
        usage "${hostsCfg}" "${currentPwdFile}" "${newPwdFile}"
        exit 0
fi

if [ "J" = "J${user2change}" ]; then
        usage "${hostsCfg}" "${currentPwdFile}" "${newPwdFile}"
        exit 0
fi

newPasswd=$(cat ${newPwdFile} | sed 's/\s*$//')
greenAlert "Will change password for hosts:"
cat ${hostsCfg}
redAlert "\nyes/no?"

yes=$(readYesAnswer)
if [ "yes" != "${yes}" ]; then
        echo "ok, do nothing."
        exit 0
fi


cat ${hostsCfg} | while read host
do
        echo "Changing ${user2change}@${host}." 
        sshpass -f ${currentPwdFile} ssh ${user2change}@${host} "echo ${user2change}:${newPasswd} | chpasswd" < /dev
/null
        redAlert "finished."
        #sshpass -f ${newPasswd}         ssh ${user2change}@${host} "pwd"
        echo
        sleep 1
done

echo
echo "Done."

commonFuncs.bash

#!/bin/bash

function colorAlert()
{
        local color=$1
        local content=$2
        echo -e "\033[1;${color}m${content}\033[0m"
}

function redAlert()
{
        colorAlert 31 "$@"
}

function greenAlert()
{
        colorAlert 32 "$@"
}

function getCurrDir()
{
        local currDir=$(dirname $(readlink -f "$0" ) )
        echo $currDir
}

function echoAlert()
{
        colorAlert "" "$@"
}

function readYesAnswer()
{
        local answYes="no"
        read answer
        pat="^[Yy]"

        if [ "A${answer}" = "A" ]; then
                #echo "OK. do nothing."
                answYes="no"
        fi

        if [[ ${answer} =~ ${pat} ]]; then
                #echo "OK. do!"
                answYes="yes"
        fi

        echo $answYes
}

function reverse() 
{
    local out=()
    while [ $# -gt 0 ]; do
        out=("$1" "${out[@]}")
        shift 1
    done
    echo "${out[@]}"
}

function rsyncFiles()
{
        local pwdF=$1
        local files=$2
        local user=$3
        local ip=$4
        local dir=$5
        redAlert "PASSWD file:${pwdF}" 
        echoAlert "files:${files}, \nuser:${user}, \nip:${ip}, \ndir:${dir}"
        if [ "J" = "J{$pwdF}" ] || [ "J" = "J${files}" ] || [ "J" = "J${user}" ] || [ "J" = "J${ip}" ] || [ "J" = "J
${dir}" ] ; then
                redAlert "Invalid para. exit."
                return 0
        fi

        redAlert "Copy\n\n${files}\n\nto ${user}@${ip}:${dir}, Yes/No?"
        yes=$(readYesAnswer)
        if [ "no" == "${yes}" ]; then
                greenAlert "ok, do nothing."
                return 0
        fi

        sshpass -f ${pwdF} rsync --progress -lptrhK -z --compress-level=9 -C  -F --include="*.so" --include="*.a" -e
 "ssh -o StrictHostKeyChecking=no" ${files} ${user}@${ip}:${dir}

        return 0
}

function getExePid()
{
    local exeName3=$1
    local pid3=""
    if [ "J" != "J${exeName3}" ]; then
        #echo "pid3=ps -ef | egrep -i "\b${exeName3}\b" | egrep -v grep | awk '{print $1}' | sed 's|\s*||g')"
        pid3=$(ps -ef | egrep -i "\b${exeName3}\b" | egrep -v grep | awk '{print $2}' | sed 's|\s*||g')
    fi      
    #echo "exename: ${exeName3}, pid:${pid3},"
    echo ${pid3} 
}

function getExePidCurrentUser()
{

    local exeName3=$1
    local pid3=""
    if [ "J" != "J${exeName3}" ]; then
        #echo "pid3=ps -ef | egrep -i "\b${exeName3}\b" | egrep -v grep | awk '{print $1}' | sed 's|\s*||g')"
        pid3=$(ps ux | egrep -i "\b${exeName3}\b" | egrep -v grep | awk '{print $2}' | sed 's|\s*||g')
    fi
    #echo "exename: ${exeName3}, pid:${pid3},"
    echo ${pid3}
}

function getPidDir()
{
    local pid23=$1
    local pidDir=""
    if [ -f "/proc/${pid23}/exe" ]; then
        #echo "pidDir=ls -lt /proc/${pid23}/exe | cut -d'>' -f2 | sed 's/\s*//g' | xargs -i{} readlink -f {}"
        pidDir=$(ls -lt /proc/${pid23}/exe | cut -d'>' -f2 | sed 's/\s*//g' | xargs -i{} readlink -f {})
    fi
    #echo "pidDir:${pidDir},"
    echo ${pidDir} | sed 's|\s*||g'
}


#echo $(getPidDir 9199)
#echo $(reverse a1 b2 c3)
#echo "pid:bash: $(getExePid bash),"
#echo "pid:bash:currentUser: $(getExePidCurrentUser 'mingyunJ.sh'),"
#yes=$(readYesAnswer)
#echo "yes:${yes}"
#rsyncFiles ~/cfgPass ../confg root 192.168.3.253 /tmp

#echo $(getCurrDir)
#redAlert "hi jin!"
#greenAlert "green garden!"

chpasswdBatch.bash is a utils to change password for SAME user under many target CentOSes.
Please keep commonFuncs.bash and chpasswdBatch.bash in the SAME dir.

Tips:

1. You may need install sshpass by:

yum -y install sshpass

2. You may need install ssh on target and local box by:

yum -y install openssh