how i can read file and store its containt in variable?

Question

I want to store number in file for example file number.txt contain 3242 I want to real this file and store its contant in variable for example variable number_var = number.txt so that number_var = 3242

score 3 · Accepted Answer · answered Nov 03 '10 at 07:22

3

number_var=$(cat number.txt)

answered Nov 03 '10 at 07:22

Ignacio Vazquez-Abrams

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score 3 · Answer 2 · answered Nov 03 '10 at 07:23

The backtick is your friend:

[madhatta@risby tmp]$ cat foo
1234
[madhatta@risby tmp]$ fred=`cat foo`
[madhatta@risby tmp]$ echo $fred
1234

You had better be pretty sure the file is a one-liner, though; if you import the whole of /boot/vmlinuz into a shell variable, you may start putting pressure on memory!

score 2 · Answer 3 · answered Nov 03 '10 at 14:29

2

In Bash, ksh and zsh:

number_var=$(<number.txt)

answered Nov 03 '10 at 14:29

Dennis Williamson

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how i can read file and store its containt in variable?

3 Answers3