Searching within Text
-
grep: Search for a pattern within files.-
-i: Ignore case. -
-ror-R: Recursively search in directories. -
-v: Invert the search (return lines that don't match).
$ grep "search_term" file.txt This line contains the search_term. -
```bash
$ grep -i "Search_Term" file.txt
This line contains the search_term.
```
Filtering and Transforming Text
-
awk: A versatile programming language for working on files.
$ echo -e "a 1\nb 2\nc 3" | awk '{print $2}'
1
2
3
-
sed: Stream editor for filtering and transforming text.
$ echo "Hello World" | sed 's/World/Universe/'
Hello Universe
Sorting and Counting
-
sort: Sort lines in text files.-
-r: Reverse the result of comparisons (descending). -
-n: Compare according to string numerical value.
$ echo -e "banana\napple\ncherry" | sort apple banana cherry -
-
uniq: Report or omit repeated lines.-
-c: Prefix lines by the number of occurrences.
$ echo -e "a\na\nb\nb\nb\nc" | uniq -c 2 a 3 b 1 c -
wc: Count words, lines, and characters in files.
- -l: Count lines.
- -w: Count words.
- -c: Count bytes.
```bash
$ echo "Hello World" | wc -w
2
```
Text Display
-
cat: Concatenate and display the content of files.
$ cat file.txt
This is the content of file.txt.
-
tac: Display files in reverse.
$ echo -e "line1\nline2\nline3" | tac
line3
line2
line1
-
nl: Number lines of files.
$ echo -e "line1\nline2\nline3" | nl
1 line1
2 line2
3 line3
-
head: Display the beginning of a file.-
-n: Specify the number of lines to show.
$ echo -e "line1\nline2\nline3" | head -n 2 line1 line2 -
-
tail: Display the end of a file.-
-n: Specify the number of lines to show. -
-f: Follow the content of a file in real-time.
$ echo -e "line1\nline2\nline3" | tail -n 2 line2 line3 -
Top comments (1)
Amazing Work