ubuntu in action

Apt-get Common Command :

         view installed software:

                      apt-get list --installed

                                or

                      dpkg -l      

         find and delete file or folder

                   sudo find / -name *docker* -exec rm -rf {} \;

                                --- {} represent  finded files , so you can use those command to use the {}

                   find . -name "*.log" -exec cp {} test3 \;    ---- copy finded files to test3 folder

                   find . -name "*.log" -exec mv {} .. \;         -------move finded files to up folder

                   find /etc -name "passwd*" -exec grep "root" {} \;   

 

1 input software

 

2  liunx software center

 

gdebi/deb

 

root init passwd

       su passwd root

 

ubuntu office software source :

      https://packages.ubuntu.com

ubuntu版本查看命令

            1.   cat /etc/issue （簡單）

            2.  cat /etc/lsb-release（具體）

            3.   uname -a（內核）

            4.   sb_release -a

            5.  cat /proc/version

 

apt-get install docker, but cannot to use , uninstall docker , can not use apt-get uninstall,  so use delete file style,  but  root cannot delete docker installed file , error as follow:

i am root ,but encounter those error:


root@mengmiao-Lenovo-G490:/proc/sys/net/ipv6/conf# find / -name *docker* -exec rm -rf {} \;
rm: 沒法刪除'/sys/class/net/docker0': 不容許的操做
rm: 沒法刪除'/sys/devices/virtual/net/docker0/uevent': 不容許的操做
rm: 沒法刪除'/sys/devices/virtual/net/docker0/carrier_changes': 不容許的操做
rm: 沒法刪除'/sys/devices/virtual/net/docker0/carrier': 不容許的操做
rm: 沒法刪除'/sys/devices/virtual/net/docker0/dev_id': 不容許的操做
rm: 沒法刪除'/sys/devices/virtual/net/docker0/carrier_down_count': 不容許的操做
rm: 沒法刪除'/sys/devices/virtual/net/docker0/proto_down': 不容許的操做
rm: 沒法刪除'/sys/devices/virtual/net/docker0/address': 不容許的操做
rm: 沒法刪除'/sys/devices/virtual/net/docker0/operstate': 不容許的操做
rm: 沒法刪除'/sys/devices/virtual/net/docker0/phys_switch_id': 不容許的操做
rm: 沒法刪除'/sys/devices/virtual/net/docker0/link_mode': 不容許的操做
rm: 沒法刪除'/sys/devices/virtual/net/docker0/dormant': 不容許的操做
rm: 沒法刪除'/sys/devices/virtual/net/docker0/statistics/tx_errors': 不容許的操做
rm: 沒法刪除'/sys/devices/virtual/net/docker0/statistics/rx_length_errors': 不容許的操做
rm: 沒法刪除'/sys/devices/virtual/net/docker0/statistics/rx_packets': 不容許的操做
rm: 沒法刪除'/proc/sys/net/ipv4/conf/docker0/accept_local': 權限不夠
rm: 沒法刪除'/proc/sys/net/ipv4/conf/docker0/accept_redirects': 權限不夠
rm: 沒法刪除'/proc/sys/net/ipv4/conf/docker0/accept_source_route': 權限不夠
rm: 沒法刪除'/proc/sys/net/ipv4/conf/docker0/arp_accept': 權限不夠
rm: 沒法刪除'/proc/sys/net/ipv4/conf/docker0/arp_announce': 權限不夠
rm: 沒法刪除'/proc/sys/net/ipv4/conf/docker0/arp_filter': 權限不夠
rm: 沒法刪除'/proc/sys/net/ipv4/conf/docker0/arp_ignore': 權限不夠
rm: 沒法刪除'/proc/sys/net/ipv4/conf/docker0/arp_notify': 權限不夠
rm: 沒法刪除'/proc/sys/net/ipv4/conf/docker0/bootp_relay': 權限不夠
rm: 沒法刪除'/proc/sys/net/ipv4/conf/docker0/disable_policy': 權限不夠

i want to kown why cannot delete those file , no matter what i  am root, so i use lsattr view file addition attr, but encounter this error:

root@mengmiao-Lenovo-G490:/proc/sys/net/ipv6/conf# lsattr docker0/
lsattr: 對設備不適當的 ioctl 操做 讀取 docker0/accept_dad 的標誌時