How to SSH into a Remote Server on a Non-Standard Port
Example: If the port is 20086, the user is “user”, and the IP is 192.168.0.111, here is the connection method:
ssh -p 20086 [email protected]
If the server user is root, you can omit the username: …
Following Baidu’s separation from Jiasule, Baidu launched its own acceleration product: Baidu Cloud Accelerator. However, for webmasters, the free version of Baidu Cloud Accelerator offers very few nodes, and imposes certain restrictions on traffic and DDoS protection. The following shows Baidu Cloud Accelerator…
How to Change the Default SSH Port on CentOS (Example: 8223):
vi /etc/ssh/sshd_config
Change: #Port 22
to
Port 8223Restart SSH:
service sshd restart
Add a firewall exception:
#/sbin/iptables -I INPUT -p tcp –dport 8223 -j ACCEPT
#/e …
Scenario: You have a bunch of machines. The server IP being accessed is 192.168.1.1, and the IP address allowed to access it is 192.168.1.2. No need to list the rest since they won’t be used anyway.
For Linux systems, the connection method is basically SSH, which can be controlled through configuration files …
How to Execute Cron Jobs Every Second in Linux
銆€銆€Many times, our scheduled tasks need to run with second-level precision, but Linux only supports scheduling down to the minute by default. Most built-in versions of Linux don’t natively support second-level execution. Using sleep makes it easy to execute tasks by the second.
1. The sleep format is as follows:
sleep 5 …
SSH fails to start on Linux, and attempting to start sshd on the server results in an error. The message reads: /var/empty/sshd must be owned by root and not group or world-writable.
Following the prompt, it’s likely a permissions issue, so check the sshd status and permissions:
# /etc/init.d/ …
1. Count the number of files in the current folder: ls -l |grep "^-"|wc -l
2. Count the number of directories in the current folder: ls -l |grep "^d"|wc -l 3. Count the number of files in the current folder, including those in subfolders: ls -lR|g …
When editing a document as a regular user in Linux, you may encounter the “W10: Warning: Changing a readonly file” prompt. Here’s how to fix it:
Normally, press i to edit, then press ESC, and then press Shift+Z+Z to save. If you get the error above, press ESC after editing, then …
I. Installing Chinese Support on the System
1. Install Chinese language pack:
yum -y groupinstall chinese-support
2. Modify character encoding configuration file
vi /etc/sysconfig/i18n
Enter:
LANGUAGE=”zh_CN.GB18030:zh_CN.GB2312:zh_CN”
SUPPORTED=”zh_CN.GB18030:zh_C …
Today, while editing a file I encountered the error: E45: Warning: Changing a readonly file, E45: ‘readonly’ option is set. The message essentially indicates insufficient permissions. Even after re-running chown with root, the prompt persisted. After some trial and error, here is the solution for your reference …
