[sed] Run and understand: Adds a string to the beginning of the specified line.

Enter the following command into your terminal. If you don’t get a “command not found” message, then it’s OK.

git --version

If the command you see as “command not found” in your terminal, please install it using the following command.

sudo apt install git

Running the following command in your terminal should output a string similar to the details shown.

git clone https://github.com/trygfmi/sed_insert-string
cd sed_insert-string
cat test1.txt
sed '2i\
fff' test1.txt

aaa
bbb
ccc
ddd
eee

aaa
fff
bbb
ccc
ddd
eee

If you enter the following command into the terminal and you don’t get a “command not found” message, then it’s OK.

source ~/bashrc_folder/macports_alias
git --version

*macOS uses the MacPorts package manager to manage commands. If you haven’t installed it yet, please see the MacPorts installation instructions at the link below. Also, you can set aliases for commands so that they can be called without conflicting with your existing environment. If this is your first time using this blog, please refer to the following two articles to set up your environment.

If you encounter a “command not found” error in the terminal, install the command using the following command and then set up an alias for it.

sudo port install git
echo 'alias git="/opt/local/bin/git"' >> ~/bashrc_folder/macports_alias

Running the following command in the terminal should output a string similar to the details shown.

source ~/bashrc_folder/macports_alias
git clone https://github.com/trygfmi/sed_insert-string
cd sed_insert-string
cat test1.txt
sed '2i\
fff' test1.txt

aaa
bbb
ccc
ddd
eee

aaa
fffbbb
ccc
ddd
eee

If you enter the following command into the prompt and you don’t get a “command not found” message, then it’s OK.

WSL2

git --version

MSYS2 MINGW64

git --version

*This has been tested on Windows using WSL2 and MSYS2 MINGW64. Please install WSL2 if possible. If you are unable to set it up, you can install MSYS2, but some commands may only work with WSL2. Please refer to the article below for instructions on how to install WSL2 and MSYS2.

If you see a “command not found” error in the prompt, please install the command using the following command.

WSL2

sudo apt install git

MSYS2 MINGW64

pacman --sync git

Executing the following command at the prompt should output a string similar to the details shown.

WSL2

git clone https://github.com/trygfmi/sed_insert-string
cd sed_insert-string
cat test1.txt
sed '2i\
fff' test1.txt

aaa
bbb
ccc
ddd
eee

aaa
fff
bbb
ccc
ddd
eee

MSYS2 MINGW64

git clone https://github.com/trygfmi/sed_insert-string
cd sed_insert-string
cat test1.txt
sed '2i\
fff' test1.txt

aaa
bbb
ccc
ddd
eee

aaa
fff
bbb
ccc
ddd
eee