1
vote
2answers
55 views

How to match a number in one file to a name in another file?

Okay, I hope this is the right place to ask. I have 2 files. The first file has 4 fields: class CRN #, Instructor ID #, Class Section #, Number of Students. Example: 0002 T00005 006 15 0004 ...
2
votes
3answers
307 views

How can I get the last line number of unique commands when grepping my history file?

I rely on my history file for previous commands, especially ones that are long with many parameters. Once I find the command and its line number(nn) I use !nn to run it. I prefer to see the full ...
3
votes
1answer
3k views

The simplest method to count lines matching specific patterns, including '0' if line is not found?

I have very big logs (several gigabytes per day), that can (but do not need to) contain specific lines. I have to count the number of occurences of every one of these lines on a daily basis. I have a ...