Basic Concept
在Linux中所有的东西都对应着一个文件，不同用户有不同的目录与默认约定的对应目录，比如：
| user type | folders, files |
|---|---|
| root | /sbin , /usr/sbin |
| all users | /bin, /usr/bin |
Abbreviations:
- bin: binary
- usr: user
- sbin: super binary
Options:
- -a : all
- -l: long:
drwxr-xr-x
文件类型
- d 目录directory
-
- 二进制文件
- l 软链接文件 link
Check Linux Version
How to check linux kernel version number?
Open a shell prompt (or a terminal) and type the following command to see your current Linux kernel version:
$ uname
# OR
$ uname -mrs
OR
$ uname -a # for all information
Example output (aws linux AMI):
4.14.77-70.59.amzn1.x86_64
或者：
$ cat /proc/version
Example outputs 1 (CentOS):
Linux version 3.10.0-957.1.3.el7.x86_64 (mockbuild@kbuilder.bsys.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC) ) #1 SMP Thu Nov 29 14:49:43 UTC 2018
Example outputs 1 (amazon linux AMI):
Linux version 4.14.77-70.59.amzn1.x86_64 (mockbuild@gobi-build-64001) (gcc version 7.2.1 20170915 (Red Hat 7.2.1-2) (GCC)) #1 SMP Mon Nov 12 22:02:45 UTC 2018
For CentOS, we can also use following command to get system information:
more /etc/redhat-release
cat /etc/redhat-release
Example output:
CentOS Linux release 7.6.1810 (Core)
Check CPU information
more /proc/cpuinfo | grep "model name"
Example outputs:
model name : Intel(R) Pentium(R) Dual CPU E2180 @ 2.00GHz
Check Memory Information
more /proc/meminfo
more /proc/meminfo | grep MemTotal
Commands
find
find -name file-name-to-be-found
Tools
You can use following tools:
- PuTTy
- Git Bash (git bash get SSH integrated already)
References:
在Azure上的Linux使用SSH
how to use ssh to connect a remote server in ubuntu
# ssh remote_host
# ssh remote_username@remote_host
# exit