finding unique values in a data file
I tried using cat
File contains :(here file is foo.sh you can input any file name here)
$cat foo.sh
tar
world
class
zip
zip
zip
python
jin
jin
doo
doo
uniq
will get each word only once
$ cat foo.sh | sort | uniq
class
doo
jin
python
tar
world
zip
uniq -u
will get the word appeared only one time in file
$ cat foo.sh | sort | uniq -u
class
python
tar
world
uniq -d
will get the only the duplicate words and print them only once
$ cat foo.sh | sort | uniq -d
doo
jin
zip
grep name1 filename | cut -d ' ' -f 4 | sort -u
This will find all lines that have name1, then get just the fourth column of data and show only unique values.