Ubuntu – Search specific text from file and output the line (Shell script)

bashcommand linescripts

Suppose I have a variable $str1

str1="20140121-21:48:26|Joanne Frances|"

What I want to do is search that part in the file. The file contains, for example:

20140121-21:48:26|Joanne Frances|Perez|9173046751.000000|Mar 31|
20140121-21:50:28|Nikko|Real|9065887272.000000|Mar 21|
20140121-22:22:53|Czarina|Revilla|9999999999.000000|Jan 21|

The output should be:

20140121-21:48:26|Joanne Frances|Perez|9173046751.000000|Mar 31|

Update: Finally know what the heck is the problem tried to echo $str1 and it outputs 20140121|Adrian Perez| meaning it really ISN'T in the file. Haaa! I'm such a mess! -_-

Best Answer

Use this:

grep "$str" filename.txt

to prevent misinterpretation of special characters.

To know more, refer this:

Quoting variables

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Ubuntu – Using text list to batch-rename files

This looks like a job for xargs.

If your file is formatted like this:

old_file1 new_file1
old_file2 new_file2

then you can do xargs -a your_file -n 2 mv.

Ubuntu – Can you help me to understand this explanation of shell quoting

I've tried to break this down a little bit for you, using your own examples/text as well, check it out:

$ cat fred    
#!/bin/bash

fred='Four spaces between these    words.'

echo "The value of \$fred is $fred"

echo "The next line being printed is simply the results of # echo \$fred"

echo $fred

Running the bash script above prints the following to the terminal/stdout:

The value of $fred is Four spaces between these    words.
The next line being printed is simply the results of # echo $fred
Four spaces between these words.

As well, you can view a terminal video of this here: http://showterm.io/98f56243f60551b338b9f

Best Answer

Related Solutions

Ubuntu – Using text list to batch-rename files

Ubuntu – Can you help me to understand this explanation of shell quoting

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