Add "networking" and "server" commands:

- SELinux statux
- resolve domain to IP
- show SSL of a domain
This commit is contained in:
bonnie 2020-01-03 00:14:40 +08:00
parent f02230af71
commit a24037ba8a

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@ -1271,6 +1271,20 @@ xcowsay
## System
[[back to top](#handy-bash-one-liners)]
##### Check out whether SELinux is enabled
```bash
sestatus
# SELinux status: enabled
# SELinuxfs mount: /sys/fs/selinux
# SELinux root directory: /etc/selinux
# Loaded policy name: targeted
# Current mode: enforcing
# Mode from config file: enforcing
# Policy MLS status: enabled
# Policy deny_unknown status: allowed
# Max kernel policy version: 31
```
##### Generate public key from private key
```bash
ssh-keygen -y -f ~/.ssh/id_rsa > ~/.ssh/id_rsa.pub
@ -2181,6 +2195,16 @@ ipmitool -I bmc lan set 1 defgw ipaddr 192.168.0.1
## Networking
[[back to top](#handy-bash-one-liners)]
##### Resolve a domain to an IP address in a Bash script?
```bash
dig +short www.example.com
```
##### Show the SSL certificate of a domain
```bash
openssl s_client -showcerts -connect www.example.com:443
```
##### Display IP address
```bash
ip a
@ -2226,6 +2250,20 @@ hostnamectl
hostnamectl set-hostname "mynode"
```
##### Find out the web server (e.g Nginx or Apache) of a website
curl -I http://example.com/
# HTTP/1.1 200 OK
# Server: nginx
# Date: Thu, 02 Jan 2020 07:01:07 GMT
# Content-Type: text/html
# Content-Length: 1119
# Connection: keep-alive
# Vary: Accept-Encoding
# Last-Modified: Mon, 09 Sep 2019 10:37:49 GMT
# ETag: "xxxxxx"
# Accept-Ranges: bytes
# Vary: Accept-Encoding
## Data wrangling
[[back to top](#handy-bash-one-liners)]