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grep:tldr:cc5bb
This command can be broken down into two parts with a pipe (|) to connect them:
-
cat ${filename}
: This command uses thecat
command to display the contents of a file specified by the${filename}
variable. The${filename}
is a placeholder that should be replaced with the actual file name or file path. Thecat
command reads the contents of the file and sends them as output. -
grep --invert-match "${search_pattern}"
: This command uses thegrep
command to search for lines in the input that do not match the specified${search_pattern}
. The--invert-match
option or-v
will exclude or invert the matches, meaning it returns lines that do not contain the${search_pattern}
. The${search_pattern}
is a placeholder that needs to be replaced with the actual pattern or regular expression you want to search for.
Combining these two commands with a pipe allows you to display the contents of the file (cat ${filename}
) and then filter the output to show only the lines that do not match a specific pattern (grep --invert-match "${search_pattern}"
).