Searching within Text
-
grep
: Search for a pattern within files.-
-i
: Ignore case. -
-r
or-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