Linux script to prompt for password
Linux do not provide any special or specific command to read password. However, bash shell comes with builtin command called read. It read date from the standard input (keyboard), or from file descriptor FD if the -u option is supplied. General syntax is as follows:
read -s -p "Password: " VARIABLE
Where,
- -s: Do not display password on screen. It causes input coming from a terminal/keyboard to not be echoed
- -p: "Password: ": Display text message
- VARIABLE: Bash variable in which your password stored
For example, try out following example at shell prompt:
$ read -s -p "Enter Password: " mypasswordOutput:
Enter Password:
Now display password:
$ echo $mypassword See complete script to accept password using read command.
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Discussion on This FAQ
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August 17th, 2006 at 2:19 am
Thanks!
September 12th, 2006 at 8:28 am
Please I want to y1, y2 and y3 to have values piped in by the pipe (|) and read to read from the file and asign them to the variables but
export tukur=2
test is a file contain 3 columns say: aa bb cc
after excuting the following command y1, y2, y3 dont contain anythin pls could someone help?
tail -n +$tukur home/tukur/test | read -r y1 y2 y3
Thank you,
Tukur Dan-Asabe.
September 12th, 2006 at 2:13 pm
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/
October 19th, 2006 at 8:58 am
Thanks nixcraft,