rm br300

-------------1rwxrw-r-- 7 6 43 groups, rwx permissions corresponding to 421 add 7,rw-corresponding 42 Add the 6,r--corresponding to 4 (drwxrw-r--here the first character d for the folder;-rwxrw-r-- Here the first character-represents a normal file) 6, So let's see what the above 755 represents. 7 corresponds to 4+2+1 rwx5 corresponding 4+1 R-x then the permission of this file is the owner rwx, group R-x, others r-x when we change the permissions generally first think about what to ch

Requirements background:The Linux system's RM-RF command is too dangerous to remove the system files in one step. Write a shell script to replace the command, requiring that when a file or directory is deleted, a backup is made and then deleted.Here are two things to do in practice:1 Simple:Suppose there is a large partition/data/, each time you delete a file or directory, you must first create a hidden directory under/data/, named after the date/time

(1) adding Trojans to RM and RMVB files Helix Producer Plus is a graphical professional streaming media file production tool. This software converts files in other formats into RM or RMVB formats, you can also re-edit the existing RM file. During editing, you can insert the prepared webpage Trojan. In this way, as long as the edited media file is opened, the webp

Solution to excessive rm file errors-general Linux technology-Linux technology and application information. The following is a detailed description. Delete the cache directory on the server today. rm keeps reporting an error because the number of files is too large. Rm seems to be the first to traverse the file and then delete it. This directory contains more tha

In Linux, the RM + grep command deletes all files except the specified file. Previous/next article 10:17:38/personal classification: liunx (185)/comment (0)/score (0/0) this afternoon, I was asked how to delete all the files in a directory except the desired files. I thought about whether grep and RM work properly. After reading the information, we came up with a command: the process is as follows. First, i

Application Scenario:This situation may occur during the preparation of online courseware. You need to play the RM video file while displaying the corresponding PowerPoint file on a video playback webpage, in addition, the pptfile automatically goes through the page as the video is played. Code principle:The corresponding programming interface provided by RealPlayer to obtain the playback time. Make the pptfile into multiple images and adjust the disp

3, Method 3, the current folder in combination with grep and xargs to process the file name: ls | Grep-v Keep | Xargs RM #删除keep文件之外的所有文件说明: LS First gets the name of all current files and folders, Grep-v Keep, the grep regular match lookup keep,-v parameter determines the result to match the results, that is, to the keep of all file names , then Xargs is used to get the parameters from the standard input and passed to the following command, where the

Command Line rm recycle bin in linux/mac -- rmtrash The command line of linux and mac does not have the recycle bin function. In many cases, an important file is sent to rm-fr * When the hand shakes. Although it may be retrieved through lost + found/debugfs in linux, however, it is difficult and cannot be recovered. People will always make mistakes. I have also made three mistakes in my work over the past

Commands such as cp/rm/mv in CentOS force override I am used to the cp, rm, mv, and other commands in freebsd to directly overwrite files of the same name, but in linux (not necessarily all, maybe I use several ), when you use the cp/rm/mv command to overwrite a file, the system always prompts "yes" or "no". It is very troublesome. If you have one or two files, y

RHEL7 system repair rm-rf/boot/etc/fstab Guide RHEL7/Centos7 has been released for so long. We all know that one feature of this system is that systemctl replaces the init system daemon process, and the system is becoming more and more modular. Many Commands have also changed in the new version of the system, and grub has changed to grub2, which is completely incomprehensible. There are also many online tutorials comparing the new version

To place the accidental deletion script:/usr/bin/remove.sh #!/bin/bashpath_cnt= "$#" trash_dir= "$HOME/.trash" mkdir-p $TRASH _dirmenu () {echoecho-e "\t\ t\tsysoptionsmenu\n "echo-e" \t1. deleteok! " echo-e "\t2. Don ' tdelete,intotherecyclebin: $HOME/.trash "echo-e" \t0. exitmenu\n\n "echo-en" \t\tenteroptions: "read-n1option} Mvfunc () {foriin[emailprotected]dostamp= ' date+%y%m%d%h%m%s ' fileName= ' basename $i ' mv-f $i $TRASH _dir/$fileName. $STAMP echodone}rmfunc () {foriin [emailprot

Some important files were accidentally deleted yesterday. after about one day of recovery, rm was successfully restored. Here we will summarize the methods. Of course, it is the most important to prevent this situation. you can refer to the Linux RM Security recovery conditions and some preparations previously written: 1. data protection. Common sense: after a file is deleted, the file content is not cleare

Common linux commands: delete rmrm [required parameters] [selective parameters] [directories or files] www.2cto. the comrm command is used to delete files or directories. if you use rm to delete files, you can still restore the files. If you want to ensure that the content of this file cannot be restored, you can use shr... Common linux commands: delete rm [required parameters] [selective parameters] [dire

Previous articlesArticle: Learning o/RM, starting from the simplest example... Learn o/RM, starting from the simplest example... 2 Learning o/RM, starting from the simplest example... 3 Learn about o/RM, and start with the simplest example. 4. Download the code generation tool and the latest demo. The tool has r

I. First move the existing system totem # Yum remove totem Ii. Install totem-xine # Yum install totem-xine 3. Install extras # Yum install xine-extras) 4. Install the DVD player # Yum install libdvdna V (if libdvdcss is installed in this step, it is not recommended that you do not have it) 5. Install lame # Yum install lame 6. Install MPEG support # Yum install FFMPEG 7. Install RM playback support # Yum install compat-libstdc ++-33 (if this Rea

I am used to the cp, rm, mv, and other commands in freebsd to directly overwrite files of the same name, but in linux (not necessarily all, maybe I use several ), when you use the cp/rm/mv command to overwrite a file, the system always prompts "yes" or "no". It is very troublesome. If you have one or two files, you can forget it. However, when copying a large number of files, this is troublesome. You need t

In Linux, avoid using rm to accidentally delete files-lost memories-blog Bus Avoid accidental deletion of files with rm in Linux: | category: Linux Copyright Disclaimer: During reprinting, please use hyperlinks to indicate the original source and author information of the article and this statementHttp://freakrobot.blogbus.com/logs/88281920.html Because most linux hair styles already use the ext3/4 fil