Text Processing

Command	Description	Example
cat	Concatenate and display file contents.	cat file.txt → Displays the content of file.txt.
grep [pattern] [file]	Search for a pattern in a file.	grep "error" log.txt → Searches for "error" in log.txt.
awk	Pattern scanning and processing language.	awk '{print $1}' file.txt → Prints the first column of file.txt.
sed	Stream editor for text manipulation.	sed 's/old/new/g' file.txt → Replaces "old" with "new" in file.txt.
sort	Sort lines of text files.	sort file.txt → Sorts the lines in file.txt.
cut	Remove sections from each line of a file.	cut -d',' -f1 file.csv → Extracts the first column from file.csv.
uniq	Report or omit repeated lines.	uniq file.txt → Removes duplicate lines from file.txt.
tr	Translate or delete characters.	tr 'a-z' 'A-Z' → Converts lowercase letters to uppercase.
wc	Count lines, words, and characters in a file.	wc file.txt → Displays the line, word, and character count of file.txt.
tee	Read from standard input and write to standard output and files.	`echo "Hello"