linux - 删除文件中每个换行符之间的换行符

Question

下面是文件的一部分，其中列出了 zimbra 帐户(500+)，用空换行符分隔

cn: Jack 
displayName: Jack Johnson
givenName: Jack
sn: johnson
zimbraMailDeliveryAddress: Jack@example.com

cn: james ryan
displayName: James Ryan
givenName: James
sn: Ryan
zimbraMailDeliveryAddress: James@example.com

....

我想要包含如下内容的文件，以便我可以使用 zmprove 将它们导入新服务器

cn: Jack displayName: Jack Johnson givenName: Jack sn: johnson zimbraMailDeliveryAddress: Jack@example.com
cn: james ryan displayName: James Ryan givenName: James sn: Ryan zimbraMailDeliveryAddress: James@example.com

我尝试在不删除新行的情况下编写脚本，但到目前为止无法提取

for line in `cat /tmp/account3.txt`;
do
    echo $line | grep "zimbraMailDeliveryAddress:" > /dev/null
    RESULT=$?

        if [ $RESULT -eq 0 ];  then 
    email=`echo $line | cut -d' ' -f2`  > /dev/null
    continue

    elif   echo $line | grep "sn:"   > /dev/null
    RESULT=$?
    if [ $RESULT -eq 0 ];  then
    sn=`echo $line | awk '{ print $2; }'`  > /dev/null
    continue

        elif  echo $line | grep "givenName:"  > /dev/null
    RESULT=$?
    if [ $RESULT -eq 0 ];  then 
    givenName=`echo $line | awk '{ print $2; }'`  > /dev/null
        continue

    elif  echo $line | grep "displayName:"  > /dev/null
    RESULT=$?
    if [ $RESULT -eq 0 ];  then  
    displayName=`echo $line | awk '{ print $2; }'`  > /dev/null
        continue

        elif echo $line | grep "cn:" > /dev/null
    RESULT=$?
    if [ $RESULT -eq 0 ];  then 
    cn=`echo $line | cut -d' ' -f2`  > /dev/null
        continue
    fi
        else
          :
    fi
        echo $email $sn $cn $displayName $givenName
done
# awk '/cn:|displayName:|givenName:|sn:|zimbraMailDeliveryAddress:/{printf "%s ", $0; next} 1' /tmp/account2.txt

Answer 1

$ awk -v RS= '{$1=$1}1' file
cn: Jack displayName: Jack Johnson givenName: Jack sn: johnson zimbraMailDeliveryAddress: Jack@example.com
cn: james ryan displayName: James Ryan givenName: James sn: Ryan zimbraMailDeliveryAddress: James@example.com