in this tutorial, How to change ssh port another with selinux. The default ssh port 22, when you change port another with rules selinux (SELINUX=enforcing) get error can't change ssh port. Solve problem!( Running command following with root account) File selinux with content SELINUX=enforcing as below: [huupv@huupv ~]$ sudo cat /etc/sysconfig/selinux [sudo] password for huupv: # This file controls the state of SELinux on the system. # SELINUX= can take one of these three values: #     enforcing - SELinux security policy is enforced. #     permissive - SELinux prints warnings instead of enforcing. #     disabled - No SELinux policy is loaded. SELINUX=enforcing # SELINUXTYPE= can take one of these three values: #     targeted - Targeted processes are protected, #     minimum - Modification of targeted policy. Only selected processes are protected. #     mls - Multi Level Security protection. SELINUXTYPE=targeted How do it... Step 1 : Open sshd_config file # vi /etc/

Centos 7 managing services with Systemd. -List all the current loaded targets as command below: $ sudo systemctl list-units -t target Each services has 3 states; enabled, disabled and static. - To list enabled services as command below: $ sudo systemctl list-unit-files --type=service | grep enabled - To start/stop/restart services as command below: # systemctl status <servicename> # systemctl stop <servicename> # systemctl start <servicename> # systemctl restart <servicename> - To check running ntp services as comman below: $ sudo systemctl list-units --type service --all | grep ntp - Set the service to start a boot: # systemctl enable <servicename> - Disable service start-up boot # systemctl disable service The update later related command line "Centos 7 managing services with Systemd" in this article.

In my post, How to use Bash script Change to folder Permissions Recursively. For example, To change all folder and file under huuphan.com folder. To list tree file and folder under huuphan.com folder [root@huupv huupv]# tree huuphan.com/ huuphan.com/ ├── a │   ├── abc.txt │   └── b │       └── c └── K 4 directories, 1 file To use find command list all file and folder under huuphan.com folder [root@huupv huupv]# find /home/huupv/huuphan.com -type d -exec ls -ld {} + >chown_folder.txt To use cat command read chown_folder.txt file [root@huupv huupv]# cat chown_folder.txt  The content in chown_folder.txt file file as below: drwxrwxr-x. 4 huupv huupv 4096 Mar  9 22:38 /home/huupv/huuphan.com drwxrwxr-x. 3 huupv huupv 4096 Mar  9 22:38 /home/huupv/huuphan.com/a drwxrwxr-x. 3 huupv huupv 4096 Mar  9 22:37 /home/huupv/huuphan.com/a/b drwxrwxr-x. 2 huupv huupv 4096 Mar  9 22:37 /home/huupv/huuphan.com/a/b/c drwxrwxr-x. 2 huupv huupv 4096 Mar  9 22:38 /home

tar command is archiving utility. Something, you can retrieve extension .tar.gz or .tar.bz2 file. How to list the contents this without extracting from command line. The syntax tar command as below: tar OPTION File_Name With OPTION : t, --list : List the contents of an archive v : Verbosely list files processed j : Filter archive through bzip2 f : filename  You may reading link as below: Iptables how to How to reset password on centos 7 Bash script example List the contents of .tar.gz file To use tar command for .tar.gz as following: $ tar -tvf links-2.12.tar.gz  The output of links-2.12.tar.gz file as below: -rwxr--r-- 1000/1000      1215 2001-10-05 14:03 links-2.12/mailcap.pl -rwxr-xr-- 1000/1000      4654 2015-06-28 22:13 links-2.12/rebuild -rw-r--r-- 1000/1000       461 2003-05-06 01:10 links-2.12/links_16x16_1.xpm -rw-r--r-- 1000/1000      2410 2003-05-06 01:10 links-2.12/links_32x32.xpm -rw-r--r-- 1000/1000      3847 2005-03-01 00:16 links-2.12/links-48x48.xpm -

How to List top sender address emails in zimbra from command line. From MTA zimbra I will run command to list 6 sender address email Zimbra . The command as below: $ cat /var/log/zimbra.log | awk -F 'from=<' '{print $2}' | awk -F'>' '{print $1}' | sed '/^$/d' | sort | uniq -c | sort -nk1 -r | sed -n '1,6p' Note: sed '/^$/d' : To delete only blank lines sed -n '1,6p' : To print 1 line to 6 line. awk -F 'from=<' '{print $2}' | awk -F'>' '{print $1}' : To print the email of sender address Conclusion Thought the article, To help you list top sender address emails in zimbra. if you any question then command below