Common sed Parameters
The sed (stream editor) command is a powerful tool in the Linux command line that allows you to perform various text manipulations on input streams. Here are some of the most common sed parameters:
1. Addressing
- Line numbers:
sed '2,5d'- Deletes lines 2 through 5. - Regular expressions:
sed '/^#/d'- Deletes lines starting with a hash symbol. - Ranges:
sed '2,/^$/d'- Deletes lines from the second line until the first blank line.
2. Editing Commands
- Substitution:
sed 's/old/new/'- Replaces the first occurrence of "old" with "new". - Global substitution:
sed 's/old/new/g'- Replaces all occurrences of "old" with "new". - Deletion:
sed '2d'- Deletes the second line. - Insertion:
sed '2i\new line'- Inserts "new line" before the second line. - Appending:
sed '2a\new line'- Appends "new line" after the second line.
graph TB
A[Addressing] --> B[Line numbers]
A --> C[Regular expressions]
A --> D[Ranges]
E[Editing Commands] --> F[Substitution]
E --> G[Global substitution]
E --> H[Deletion]
E --> I[Insertion]
E --> J[Appending]
The sed command is highly versatile and can be combined with other Linux tools, such as awk and grep, to create powerful text processing workflows. By understanding the common sed parameters, you can efficiently manipulate text data, automate repetitive tasks, and streamline your Linux command-line operations.
