Linux Command Line

文件解压缩

unpacking or uncmpressing .gz files under linux and unix

$ gunzip file.gz  #

$ gzip -d file.gz #

$ tar -zxvf file.tar.gz -C /opt/gopath # -C(Uppercase)指定目录 (change to directory DIR)

$ iconv -f gbk -t utf-8

$ dos2unix -o file.a file.b

Print Working Directory

# pwd -LP
/home/timgise

Ubuntu Package Manager软件包管理

Advanced Packing Tool (APT)

Print network connections, routing tables, interface statistics, masquerade connections, and multi‐cast memberships

netstat -tlunp  ## {-t|tcp} {-u|--udp} {-l|--listening} {-n|--numberic}

iptables/ip6tables — administration tool for IPv4/IPv6 packet filtering and NAT

iptables -L ## {-L|--list} List the rules in a chain or all chains

保存当前防火墙规则，必要时恢复

iptables-save > /etc/iptables-up-rules  #保存
iptables-restore < /etc/iptables-up-rules # 恢复

添加用户、工作目录、设置密码

$ useradd -d /home/dev -m  -s /bin/bash dev
$ passwd dev

修改SSH服务端口(ubuntu server)

$ vi /etc/ssh/sshd_config # Port 22

重启sshd服务

$ sudo service sshd restart

Add user to the sudo group

usermod -aG sudo tomcat7 ##
sudo vi /etc/group ## 查看系统所有用户组

Disk Free

df -h  # Human readable output

Memory Usage

free -m  # displays all data im MBs

lshw - list hardware

lshw -C network