first part:
LS -L (IST) -R (Ecursive Recursive) -color
RM-RF DIR
Cat does not automatically paginize, more can be paged
the second part:
If there is no Umount floppy disk, it may not be written directly on the floppy disk, because Linux uses the write disk operation when the system idle or buffer is full (increasing efficiency ??), sometimes you Copy a file in the floppy disk, if you don't use the floppy disk directly, maybe that file is still in the buffer, there is no copy. Therefore, the correct way should be first umount / dev / fd0, then wait for the floppy light to off Remove the floppy disk, so that all writes operations have been completed. "|" Pipe symbols are used to create new files or overwritten the original files or overwritten the output of the output of the previous command as the output of the previous command. ">>" Add new content after the original file or create a new file "<<" means transmitting a data to the previous command, for example: cat >> Friends << "EOF"> A> B> c> EOF run After a line, it means that the next input content is saved in the Friends file, and when we enter "EOF", we end. In the middle, I entered A b C three lines, and ">" in front of each line is the prompt symbol generated by the system. The fourth line enters the "EOF" system to save the A b C three lines just entered into a file called Friends. LS --COLOR = never * .txt> Report does not display text color, record all TXT files to the report file in the CP source directory target position -R Copy the original directory all files and subdirectories echo message "I love you" Show some content below the character interface, here is "I love you" export lc_all = Define a variable lc_all and set to empty null export lang = zh_cn.gb2312 Define a variable LANG value is zh_cn.gb2312 export http_proxy = "http: / / xxx.xxx.xxx.xxx:port "Defines the HTTP Proxy Server Find -Iname [Directory] file name inside the specified directory (if you do not specify a directory is the current directory) Find the file PS -A | GREP Some_Command with PS Command plus the -a parameter displays all currently running processes, with the pipe symbol "|" plus the GREP command to retrieve whether the Some_Command we specified is running Lynx http://www.google.com/ character interface web browser, We used here to browse http://www.google.com
the third part:
It should be noted that the mount command is loaded with a floppy disk, the disc, not a floppy drive, and the optical drive. Some beginners are easy to make a problem, think that after using the above command, the floppy drive will become / mnt / floppy, the optical drive will become / mnt / cdrom, in fact, when you want to change a CD or floppy disk, you must first uninstall , Reloading the new disk.
The uninstalled command format is: UMONUT directory name, for example to uninstall the floppy disk, enter the command umonut / mnt / floppy. It is to be noted that the pop-up button directly on the light-drive panel is not active before uninstalling the disc.
