bash how to read a single line or filenames with spaces solution


This happens all the time, you are reading from a textfile which has spaces eg:

datainfo 00
datainfo 11

If you do loop on it like this:
for info in `cat $file`; do
echo "info=$info"
done


It will treat datainfo and 00 as two separate lines:

info=datainfo
info=00

Obviously that's not what we want and there are many weird solutions in bash but I'll try and pick what I feel is the simplest and most practical.

My favorite solution:

The key is setting the IFS as below and changing the default delimiter from space ""to newline or \n. You can use the same code and it tells bash to understand not to see a " " space as a delimiter so only a newline is counted. In plain English this makes it so files and directories with spaces are interpreted as intended.

IFS=$(echo -en "\n\b")

for info in `cat $file`; do
echo "info=$info"
done

Solution #2
while read -r; do
line=$REPLY
id=`echo $line|cut -f 2 -d " "`
ip=`echo $line|cut -f 1 -d " "`
done < migratelist.txt


Tags:

bash, filenames, spaces, textfile, eg, datainfo, info, echo, quot, solutions, ll, simplest, ifs, default, delimiter, newline, counted, directories, interpreted, en, reply, ip, migratelist, txt,

Latest Articles

  • ImageMagick Convert PDF Not Authorized
  • ImageMagick Converted PDF to JPEG some files have a black background solution
  • Linux Mint Mate Customize the Lock screen messages and hide username and real name
  • Ubuntu/Gnome/Mint/Centos How To Take a partial screenshot
  • ssh how to verify your host key / avoid MIM attacks
  • Cisco IP Phone CP-8845 8800/8900 Series How To Reset To Factory Settings Instructions
  • ls how to list ONLY directories
  • How to encrypt your SSH private key file id_rsa
  • Linux Mint 18 Disable User Name List from showing on Login Screen
  • Firefox Cannot Hit Enter Key In Address Bar and Location History Not Working
  • Cisco Unified Communications Manager / CUCM IP 8.6,10,12 Install Error Solution
  • Ubuntu Debian Mint Linux SSHD OpenSSH Server Not Starting After Reboot Solution
  • nmap how to scan for all ports and not just the 1000 most common ports
  • Windows 7,8,10 and Server 2008, 2012, 2016, 2019 Read Only Attribute Won't Go Away
  • bind / named how to make a wildcard record and retain defined A records
  • Cisco Unified Communications Manager 12 Install Errors on Proxmox/KVM
  • Local Vs Universally Administered MAC Address NIC Refuses to come up
  • Cisco Unified Communications Manager 12 CUCM 12 - How To Enable Video Calling
  • Windows 7, 8, 10, Windows Server 2008, 2012, 2016, 2019 How To AC97 Audio Drivers and Other Unsigned Drivers
  • Cisco Unified Communications Manager / CUCM IP Telephony Definitions