Install 5 programs with the following brew command firstly then have fun 🙂
$ brew install cowsay fortune figlet lolcat boxes$ date | lolcat
$ cal | lolcat
$ fortune | cowsay | lolcat
$ git log -1 | cowsay -f dragon-and-cow | lolcat
When we want to check whether current terminal is attached to stdin, stdout and stderr streams or not, we can use the below codes. I tried with piping, and redirection so both works well.
As seen in below 6 usages, stdin is not listed in output of commands except first one. Because stdin is used by piping or redirection.
$ ([ -t 0 ] && echo stdin; [ -t 1 ] && echo stdout; [ -t 2 ] && echo stderr; echo hello)
stdin
stdout
stderr
hello$ echo hello | ([ -t 0 ] && echo stdin; [ -t 1 ] && echo stdout; [ -t 2 ] && echo stderr; cat)
stdout
stderr
hello$ ([ -t 0 ] && echo stdin; [ -t 1 ] && echo stdout; [ -t 2 ] && echo stderr; cat) <<<"hello"
stdout
stderr
helloI will not write all story here but people were using Teleprinter (Teletypewriter, Teletype, TTY) from 1830s and 1840s. As seen in the following pictures, it was an electromechanical device used for communicating text over telegraph lines etc. There wasn't any monitor, output was written in a paper. Some models were creating punched tape for data storage (either from typed input or from data received from a remote source) and read back such tape for local printing or transmission.
Nowadays, we use computers with monitor and operating system but Linux still uses TTY concept under the hood 🙂
You can find some diagrams below relation with Terminal Emulator and TTY
After you join an organization, you will need to clone all git repositories in your machine probably. 🙂
So first follow this post https://kenanhancer.com/2018/11/08/github-connect-with-your-ssh-public-key/ to create a ssh key in your machine and put in github then you can clone all repositories for any user.
if you have any authentication issue, then create an access token from github, copy and paste instead of {acceess-token} in the following code.
curl -u {access-token}:x-oauth-basic -s https://api.github.com/users/kenanhancer/repos?per_page=2 | grep ssh_url | awk -F '"' '{print $4}' | xargs -n 1 -P 4 git cloneIn order to learn github API endpoint urls, use the following code.
curl https://api.github.com/To learn more details about official GitHub REST API v3, use the following link.
| Command | Description |
|---|---|
| CTRL + A | Move to the start of the line. |
| CTRL + E | Move to the end of the line. |
| CTRL + B | Move back one character. |
| CTRL + F | Move forward one character. |
| CTRL + D | Delete one character after cursor. |
| CTRL + H | Delete one character after cursor. |
| CTRL + U | Delete from the cursor to the beginning of the line. |
| CTRL + K | Delete from the cursor to the end of the line. |
| CTRL + W | Delete from the cursor to the start of the word. |
| !! | Execute last command in history. |
| !n | Execute nth command in history. |
| !$ | Last argument of last command. |
| !^ | First argument of last command. |