Question

Use linux

Original question:

d) Use metacharacters and the ls -lL command (with lower and upper case L) to list all filenames under the datafiles directory that contain a dot '.' with the letter 'f' or 'u' anywhere after the dot.

e) Use metacharacters and a single ls -lL command (with lower and upper case L) to listall file names that contain a dot '.' followed by a lower case letter, then end with the letter 't' or 'r' as the second from last character. And these files should be from your current directory as well as any directory under the current directory that contains the letters "data".
For example: data1/a.pqrs would be a match, but dabta.Dtu and datafiles/.softdo not match.
Hint: use two command arguments, one for the current directory, and one for directories the contain 'data'.

Instructure sample output:

d)

-rwx------ 1 rpa b20003 2401 Sep 5 14:15 datafiles/famous.backup
-rwx------ 2 rpa b20003 2401 Sep 5 14:25 datafiles/famous.soft

e)

-rwx------ 2 rpa b20003 2401 Sep 5 14:25 datafiles/famous.hard
-rwx------ 2 rpal b20003 2401 Sep 5 14:25 famous.data

What I have so far:

[dfoote1$$$$$$ bin]$ ls -lL /students/dfoote1/bin/datafiles/*.*[fu]*
-rwx------ 1 dfoote1 students 2401 Sep 17 17:45 /students/dfoote1/bin/datafiles/famous.backup
-rwx------ 2 dfoote1 students 2401 Sep 17 16:15 /students/dfoote1/bin/datafiles/famous.soft
[dfoote1$$$$$$ bin]$ ls -ll /students/dfoote1/bin/datafiles/*.*[fu]*
-rwx------ 1 dfoote1 students 2401 Sep 17 17:45 /students/dfoote1/bin/datafiles/famous.backup
lrwxrwxrwx 1 dfoote1 students   33 Sep 17 17:40 /students/dfoote1/bin/datafiles/famous.soft -> /students/dfoote1/bin/famous.data

Answer 1

Answer d)

What ever you have done is correct.

Answer e)

ls *.[[:lower:]]*[tr]? *data*/*.[[:lower:]]*[tr]

In the above command i use * for any character as first name, then . then i[[:lower:]] means the character after . is lower case letter, then * means any character with any length, then [tr] means then second last character with either t or r, ? means the last character will be any. I give 2 times the same expression , one for current directory and other for directory contains data as the word.

Screenshot