Introduction
A small history export stores a record number and a program name on each pipe-delimited line. An analyst needs only the program field for a later report.
This challenge applies field extraction from the pipeline lab and file redirection from the stream lab to one simple artifact.
Extract the Program Field
Current Situation
/home/labex/project/history-analysis/command-history.txt contains five records. Each line has a history number in field 1 and a program name in field 2, separated by |.
Scope
- Extract field 2 from every record.
- Keep the original record order and repeated names.
- Save the result as
programs.txt.
Your Goal
Create one file containing the five program names, one per line.
Acceptance Criteria
programs.txtcontains exactly one field-2 value for each source record.- History numbers and delimiter characters are absent.
- The source order and repeated
lsentry are preserved.
Hints
Which field tool applies?
The pipeline lab used cut with a chosen delimiter and field number. Redirect that command's standard output to the required file.
Summary
You extracted one delimited field and saved it with standard-output redirection.
