One linux Command (29) every day: chgrp command

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You can use the chgrp command to retrieve the group of the change file and directory. In this way, you can use the group name or group ID. The Chgrp command is short for the change group! The group name to be changed must exist in the/etc/group file. 1. Command Format: www.2cto.com chgrp [Option] [group] [file] 2. Command function: The chgrp command can change the group to which the file or directory belongs by using the group name or group ID. The permission is a Super User. 3. command Parameters: required parameters: -c output debugging information when a change occurs-f No error information is displayed-R displays detailed processing information when processing the specified directory and all files in its subdirectories-v runtime-dereference acts on the symbol link pointing, instead of the symbolic link itself -- no-dereference acts on the symbolic link itself and selects the parameter: -- reference = <file or directory> -- help display help information -- version display version information 4. run the command chgrp-v bin log2012.log to change the group attribute of a file by using instance: instance 1: [root @ localhost test] # ll --- xrw-r -- 1 root 302108 11-13 03 log2012.log [root @ localhost test] # chgrp-v bin log2012.log "log2012.log" group changed to bin [root @ localhost test] # ll --- xrw-r -- 1 root bin 302108 11-13 log2012.log description: change the log2012.log file from the root group to the bin group instance 2: Change the group attribute command of the file according to the specified file: www.2cto.com chgrp -- reference = log2012.log log2013.log output: [root @ localhost test] # ll --- xrw-r -- 1 root bin 302108 11-13 log2012.log-rw-r -- 1 root 61 11-13 log2013.log [root @ localhost test] # chgrp -- reference = log2012.log log2013.log [root @ localhost test] # ll --- xrw-r -- 1 root bin 302108 11-13 03 log2012.log-rw-r -- 1 root bin 61 11-13 log2013.log description: change the group attribute of the file log2013.log so that the Group attribute of the file log2013.log is the same as that of the reference file log2012.log. Example 3: Change the group attribute of the specified directory and all files in its subdirectories. command: output: [root @ localhost test] # lldrwxr-xr-x 2 root 4096 11-30 08:39 test6 [root @ localhost test] # cd test6 [root @ localhost test6] # ll --- xr -- r -- 1 root 302108 11-30 08:39 linklog. log --- xr -- r -- 1 root 302108 11-30 08:39 log2012.log-rw-r -- 1 root 61 11-30 08:39 log2013.log-rw-r -- 1 root root 0 11-30 08:39 log2014.log-rw-r -- 1 root 0 11-30 08:39 log2015.log-rw-r -- 1 root 0 11-30 08:39 log2016.log- rw-r -- 1 root 0 11-30 08:39 log2017.log [root @ localhost test6] # cd .. [root @ localhost test] # chgrp-R bin test6 [root @ localhost test] # cd test6 [root @ localhost test6] # ll --- xr -- r -- 1 root bin 302108 11- 30 linklog. log --- xr -- r -- 1 root bin 302108 11-30 log2012.log-rw-r -- 1 root bin 61 11-30 08:39 log2013.log-rw-r -- 1 root bin 0 11-30 08:39 log2014.log-rw-r -- 1 root bin 0 11-30 08:39 log2015.log-rw-r -- 1 root bin 0 11-30 08:39 log2016.log- rw-r -- 1 root bin 0 11-30 08:39 log2017.log [root @ localhost test6] # cd .. [root @ localhost test] # lldrwxr-xr-x 2 root bin 4096 11-30 test6 [root @ localhost test] # description: change the group attributes of all files in the specified directory and Its subdirectories. Example 4: Use the group ID to change the group attributes. Command: chgrp-R 100 test6 output: [root @ localhost test] # chgrp-R 100 test6 [root @ localhost test] # lldrwxr-xr-x 2 root users 4096 11-30 test6 [root @ localhost test] # cd test6 [root @ localhost test6] # ll --- xr -- r -- 1 root users 302108 11-30 linklog. log --- xr -- r -- 1 root users 302108 11-30 log2012.log-rw-r -- 1 root users 61 11-30 08:39 log2013.log-rw-r -- 1 root users 0 11-30 08:39 log2014.log-rw-r -- 1 root users 0 11-30 08:39 log2015.log-rw-r -- 1 root users 0 11-30 08:39 log2016.log- rw-r -- 1 root users 0 11-30 08:39 log2017.log [root @ localhost test6] # description: change the attributes of the file group by using the group ID. 100 is the identifier of the users group. You can view the group and group ID in the/etc/group file.