chmod

文件目录权限： 什么是文件权限： 在Linux中，每个文件都有所属的所有者，和所有组，并且规定了文件的所有者，所有组以及其他人对文件的，可读，可写，可执行等权限。 对于目录的权限来说，可读是读取目录文件列表，可写是表示在目录内新增，修改，删除文件。可执行表示可以进入目录 Linux权限的目的是（保护账户的资料） Linux权限主要依据三种身份来决定： user/owner -------- 文件使用者,文件属于哪个用户 group ---------- 属组,文件属于哪个组 others ---------- 既不是user，也不再group，就是other，其他人 linux权限的查看 ls -l /var/log/mysqld.log 1. 权限: 第一个字母为文件类型，后续9个字母，每3个一组，是三种身份的组合 2. 属主: 当前这个文件的拥有者 3. 属组: 也是文件的拥有者 4. 时间是最后一次修改文件的时间 # 文件类型 - 一般文件 d 文件夹 l 软连接（快捷方式） b 块设备，存储媒体文件为主 c 代表键盘,鼠标等设备 文件的权限： r read可读，可以用cat等命令查看 w write写入，可以编辑或者删除这个文件 x executable 可以执行 目录权限 r 可以对此目录执行ls列出所有文件 w 可以在这个目录创建文件 x 可以cd进入这个目录

查看用户 1 whoami #要查看当前登录用户的用户名 2 who am i #表示打开当前伪终端的用户的用户名 3 who mom likes who 命令其它常用参数 1 参数 说明 2 -a 打印能打印的全部 3 -d 打印死掉的进程 4 -m 同am i,mom likes 5 -q 打印当前登录用户数及用户名 6 -u 打印当前登录用户登录信息 7 -r 打印运行等级 1. 创建用户 adduser这个命令，我们很容易理解其作用，因为完全可以顾名思义：add是英语“添加”的意思，user是英语“用户”的意思，因此adduser就是用于添加用户。 1 adduser newname // 新建用户newname useradd 只创建用户，创建完了用 passwd lilei 去设置新用户的密码。 adduser 会创建用户，创建目录，创建密码（提示你设置），做这一系列的操作。 其实 useradd、userdel 这类操作更像是一种命令，执行完了就返回。而 adduser 更像是一种程序，需要你输入、确定等一系列操作 删除用户 deluser是delete和user的缩写，delete是英语“删除”的意思，user是“用户”的意思。 1 userdel newname 单单用deluser命令，不加参数的话，只会删除用户，但是不会删除在/home目录中的用户家目录

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: After installing the SUPEE 7405 patch, we noticed a problem uploading images from the admin. All file permissions are being set to CHMOD 640 which makes them inaccessible to all users. Is there a solution that does not involve rewriting the /lib/Varien/File/Uploader.php file? 回答1: A new version of SUPEE-7405 has been released that resolves this issue: http://magento.com/security/patches/supee-7405 Updated February 23, 2016 Updated versions of this release are now available. The updates add support for PHP 5.3 and address issues with upload

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I want to chmod recursively in my build.xml and borrowed the following from this post : <chmod file="${basedir}/foo/**" perm="755" type="both"/> It's unbelievably slow since that directory is deep and includes a large number of files. This works much better & faster: <exec executable="chmod" dir="${basedir}/foo" failonerror="true"> <arg line="-R 0755 ." /> </exec> Are there any downsides of using exec ? Speed is of importance. If yes; am I using chmod incorrectly? 回答1: Exec is faster because the chmod task is gathering all the files and then

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm working on Windows and on the production there's a Linux system and I'd like to chmod some files to 0777, but I don't know how to do it on Windows. I rather not do it on production, because I'm unable to commit/push there. Is there a way to chmod 0777 a file on Windows and commit it to Git so that it stays 0777 when I clone/pull on the production? 回答1: If you want to mark the file as executable, you can use git update-index --chmod=+x <your_file> If you really want to have the file writable for everyone, you would have to set up a post

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am new to laravel. I was trying to open http://localhost/test/public/ and I got Error in exception handler. I googled around and changed the permission of storage directory using chmod -R 777 app/storage but to no avail. I changed debug=>true in app.php and visited the page and got Error in exception handler: The stream or file "/var/www/html/test/app/storage/logs/laravel.log" could not be opened: failed to open stream: Permission denied in /var/www/html/test/bootstrap/compiled.php:8423 Then I changed the permissions of storage directory

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am trying to recursively change the permission of directories and sub-directories for "data" directory and running into following error..can someone provide inputs on the below error? <username:/local/mnt/workspace/data>chmod -R 0644 . chmod: cannot read directory `.': Permission denied 回答1: Directories need the execute permission set in order to see their contents. From http://content.hccfl.edu/pollock/AUnix1/FilePermissions.htm You can think of read and execute on directories this way: directories are data files that hold two pieces of

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: How would I change all files to 644 and all folders to 755 using chmod from the linux command prompt? (Terminal) 回答1: One approach could be using find: for directories find . -type d -print0 | xargs -0 chmod 0755 for files find . -type f -print0 | xargs -0 chmod 0644 回答2: The easiest way is to do: chmod -R u+rwX,go+rX,go-w /foo which basically means: to ch ange file mod es -R ecursively by giving: u ser: r ead, w rite and e X ecute permissions, g roup and o ther users: r ead and e X ecute permissions, but not -w rite permission. Please note

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: It's not work fo me: target_dir = "a/b/c/d/e/" os.makedirs(target_dir,0777) os.chmod work only for last directory ... 回答1: You can use os.walk to traverse directories. (Below not tested, experiment it yourself) for r, d, f in os.walk(path): os.chmod(r, 0o777) 回答2: ghostdog74's answer almost works, but it tries to walk into the directory before it chmods it. So the real answer is less elegant: os.chmod(path , 0o777) for root,dirs,_ in os.walk(path): for d in dirs : os.chmod(os.path.join(root,d) , 0o777) 回答3: One line version for this is: list

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: i want to create database in sdcard or external sdcard for this i have try this code and using this i have successfully created database in sdcard but in logcat it give me warning like below Logcat 07-18 14:18:22.140: W/FileUtils(8595): Failed to chmod(/mnt/sdcard/peakmedia/DB_PMD): libcore.io.ErrnoException: chmod failed: EPERM (Operation not permitted) DB_Helper.java public class DB_Helper extends SQLiteOpenHelper { public DB_Helper(Context context) { super(context, Environment.getExternalStorageDirectory().getAbsolutePath() + File