"Linux Series" "Basic Edition" chapter II file, directory management

2.  files, directory management     2.1  What file directories are available         2.1.1  /bin         2.1.2 /boot         2.1.3 /dev        2.1.4 /etc         2.1.5 /home        2.1.6  /lib  /lib64        2.1.7 /meida         2.1.8 /mnt        2.1.9  /opt        2.1.10 /proc         2.1.11 /run        2.1.12 /sbin         2.1.13 /srv        2.1.14  /sys        2.1.15 /tmp        2.1.16 /usr         2.1.17 /var    2.2  Common Commands          2.2.1 tree //Displays the directory structure in a tree-shaped structure;                 yum install -y tree  // Install the tree package;                tree -- hep //View the usage of the tree,  or specify the depth of  man tree; tree -l 2 //with the 2;         2.2.2 ls /home/username //  List User name;                    ls /etc/ssh/ sshd_config  //List configuration Files         2.2.3 useradd  username //Add user name   &Nbsp;     2.2.4 ldd /bin/ls  //See which libraries a file depends on          2.2.5 ls -l /proc/28/   //View process pid=28 Process directory      2.3 ls command details         2.3.1 ls -l  list files, directories         2.3.2 ls -i  view inode numbers for files, directories              2.3.2.1 ls -i /root             2.3.2.2 ls -i .             2.3.2.3 ls -i .ssh/.         2.3.3 ls -a  Show all hidden files, directories          2.3.4 ls -t  Sort by Time          2.3.4 ls -h  Display Unit         2.3.5 ls -d  only lists the directory itself          2.3.6 ll  is an alias for Ls -l         2.3.7 which  ll   see the path to ll file         2.3.8 ls -la              2.3.8.1  listed on the left first bit d represents the directory directory              2.3.8.2  List Left first-indicates file              2.3.8.3  listed on the left first digit C means the string device              2.3.8.4  lists the left first bit l indicates a soft link file, equivalent to a shortcut              2.3.8.5  listed on the left first bit B represents a block device, such as a disc, disk, etc.              2.3.8.6  listed on the left first bit s represents the socket file for inter-process communication          2.3.9 cat  Viewing text documents 

"Linux Series" "Basic Edition" chapter II file, directory management