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 chmod 755 /exampledirectory/ In many cases, the permissions should also be changed recursively on all files and subdirectories This can be done through chmod by using the R option To change all permissions for files within a directory to read and write for the owner, read for the group, and read for other users, run the following command For example $ chmod 755 R directory_name $ chmod 755 R /home/linuxtechi/data Example 3) Assign permissions using text notation Another way of assigning permissions is by using the text notation In this method, the chmod command takes flags or symbols which represent the owner, group, others or all users ( u, g , and o) in the syntaxThe chmod command when given a number basically treats it as a 4 digit octal number, octal ( base 8) as in the digits 0 to 7 , where the position from left to right are special ;

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Chmod 755 example

Chmod 755 example- For example If one file has mode 740 rwxr , setting mode u=rwX,g=rX,o=rX with ansible, you will get 755 rwxrxrx instead the expected 644 rwrr Despite that this is not what you wanted, it will make the file executableThe number defined after chmod represents the permissions The chmod 775 is an essential command that assigns read, write, and execute permission to a specific user, group, or others In this guide, check out how to use chmod 755 Chmod basics Before diving deeper, let's have a look at the basics of chmod

Chown

 In addition to these beautiful answers I want to mention a small but probably important difference The command chmod 755 file is equivalent to chmod 0755 file If we run this command on a file which has the SETUIDbit or SETGIDbit set, it will remove the SETUID/SETGIDbit chmod x file will leave the SETUID/SETGIDbit untouched We can seeThe group permission is 5 and others permission is 4 Therefore, the commands that use numbers to represent permissions arechmod 754 file For example, there's one in my directoryfile2File, current permissions arerwrr(644), now change torwxrxrx(755), execute the command $ chmod 755 file2You can Description of other parameters chmod Examples Permissions Using Numeric mode Setting Read/Write/execute to owner Read/execute to group and everyone else to example1txt chmod 755 example1txt #rxwrxrx Copy Setting Read/Write to owner Read/execute to group and read only to everyone else to example2txt chmod 664 example2txt #rwrwr– Copy

 For example, umask 000 means anyone has read, write, and execute permissions on all newly created files Let's say we want to set more restrictive permissions for the newly created files and directories so others will not be able to cd to the directories and read files What is the difference between umask and chmod? A 777 permission on the directory means that everyone has access to read/write/execute (execute on a directory means that you can do a ls of the directory) 755 means read and execute access for everyone and also write access for the owner of the file When you perform chmod 755 filename command you allow everyone to read and execute the file, owner To assign reasonably secure permissions to files and folders/directories, it's common to give files a permission of 644, and directories a 755 permission, since chmod R assigns to both Use sudo, the find command, and a pipemill to chmod as in the following examples To change permission of only files under a specified directory

 For example, to change the permissions of all files and subdirectories under the /var/www directory to 755 you would use $ chmod R 755 /var/www Operating on Symbolic Links Symbolic links always have 777 permissions By default, when changing symlink's permissions, chmod will change the permissions on the file the link is pointing toTo assign 755 permission of all files and directories under /opt/dir # chmod c R 755 /opt/dir This would also remove any special permission if already assigned to any of the files or directories under /opt/dir For example, I created a file with Sticky Bit Special permission under /opt/dir You can use find if you can define some wildcard For example find name "*sh" exec chmod 755 {} ;

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 In the first command, for the 'others' clearly I haven't given any ownership to the files and in the second command I am giving read and execute permission to others (chmod 755) So what will exactly happen now?Chmod mode = 0755 Numeric Mode Examples Allow read permission to everyone $ chmod 444 file Allow everyone to read, and execute the file $ chmod 755 file Make a file readable by anyone and writable by the owner only $ chmod 644 file Make a file readable and writable by the group and others $ chmod 066 file Symbolic ModeView (u)ser, (g)roup and (o)thers permissions for chmod 755 (chmod arwx,gw,ow) or use free online chmod calculator to modify permissions easily

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 Examples To Change group ownership In our case I am using group1 as a group in the system To change ownership we will use chown group1 file1txt You can see that the group permissions changed to group1 from root, if you use v option it will report that We just need to add a "" to change group Chmod 755 means that the owner has full read, write, and execute privileges while the group has read and execute permissions, and the other group has read and execute permissions Let me use an analogy, person A (Owner) is the owner of the file so he has full permission do what ever he wants with the file read, write, execute (7)Specifies the new permissions The mode parameter consists of four numbers The first number is always zero The second number specifies permissions for the owner The third number specifies permissions for the owner's user group The fourth number specifies permissions for everybody else Possible values (to set multiple permissions, add up

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 chmod examples using octal mode First column shows the chmod command , second column shows how the value is calculated for the permission last columns of owner, group, others shows individual octal values and actual bit set on file as seen by ls l For setting any other permission combination for owner, group & other , pick correspondingEveryone Else In this case there are 3 digits given For example, to change the permissions of all files and subdirectories under the /var/www/html directory to 755 you would use chmod R 755 /var/www/html The mode can also be specified using the symbolic method

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Javarevisited 10 Examples Of Chmod Command In Unix Linux

Chmod gowx mydir This denies group members and others the permission to create or delete files in mydir (gow) and allows group members and others to search mydir or use it in a path name (gox) This is equivalent to the command sequence chmod gw mydir chmod ow mydir chmod gx mydir chmod ox mydirTo put it simply, use chmod command to change the file or directory permissions Following is a sample of ls l command output In this, the 9 characters from 2nd to 10th position represents the permissions for the 3 types of users rwrr 1 john john 272 Mar 17 02 testtxt In the above example User (john) has read and write permission Type chmod 755 * to change mode for all files in that directory If you only want to change mode for a special type of file your can use chmod 755 *txt *dat orchmod 755 filenameext FTP In this example we're going to use WS FTP, but you can use any other FTP software that support chmod UNIX

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