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I recently had to clone a very large repository through SSH, every time i did i got this error   Cloning into ‘large-repository’… remote: Counting objects: 20248, done. remote: Compressing objects: 100% (10204/10204), done. error: RPC failed; curl 18 transfer closed with outstanding read data remaining fatal: The remote end hung up unexpectedly fatal: early EOF fatal: index-pack failed I could be the connection is bad , i finally fixed by using the commands below: $ git clone [email protected]:large-repository –depth 1 $ cd large-repository $ git fetch –unshallowRead More →

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By default Apache only allows upto 150 connections, if the number is over, you will be in the queue. It will look like the server is down. The limit for server is usually configured in the following files: /etc/apache2/apache2.conf /etc/apache2/mods-available/mpm_worker.conf /etc/apache2/mods-available/mpm_prefork.conf This is the content to update:   <IfModule mpm_worker_module> ServerLimit 600 StartServers 10 MinSpareThreads 75 MaxSpareThreads 250 ThreadLimit 64 ThreadsPerChild 32 MaxRequestWorkers 600 MaxConnectionsPerChild 800 </IfModule>  Read More →

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Do you see this error in your mail.log? “Please contact your Internet service provider since part of their network is on our block list (AS3140)” Go to this website to request Outlook team to remove your IP from their blocked list. https://support.microsoft.com/en-us/getsupport?oaspworkflow=start_1.0.0.0&wfname=capsub&productkey=edfsmsbl3&locale=en-us&ccsid=635611717755428181Read More →

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Web/Mail/Database can use the same certificate to allow its client to connect to the server. Postfix: postconf -e smtpd_tls_cert_file=’/etc/pki/tls/certs/cert.pem’ postconf -e smtpd_tls_key_file=’/etc/pki/tls/private/privkey.pem’ postconf -e smtpd_tls_CAfile=’/etc/pki/tls/certs/fullchain.pem’ Dovecot (POP3/IMAP server) SSL certificate settings are defined in Dovecot main config file, /etc/dovecot/dovecot.conf (Linux/OpenBSD) or /usr/local/etc/dovecot/dovecot.conf (FreeBSD): ssl = required ssl_cert = </etc/pki/tls/certs/cert.pem ssl_key = </etc/pki/tls/private/privkey.pem ssl_ca = </etc/pki/tls/certs/fullchain.pem Restarting Dovecot service is required.   Apache (web server) On RHEL/CentOS, SSL certificate is defined in /etc/httpd/conf.d/ssl.conf. On Debian/Ubuntu, it’s defined in /etc/apache2/sites-available/default-ssl (or default-ssl.conf) On FreeBSD, it’s defined in /usr/local/etc/apache24/extra/httpd-ssl.conf. Note: if you’re running different version of Apache, the path will be slightly different (apache24 will be apache[_version_]). On OpenBSD, if you’re running OpenBSD 5.5 or earlier releases, it’s definedRead More →

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### Restrict User to FTP Only: A Guide for Enhanced Security and Access Control In any organization or server setup, securing user access is a critical component of maintaining data privacy, integrity, and overall system security. One common security measure is restricting users to only a specific service or protocol, such as **FTP** (File Transfer Protocol), to prevent unauthorized access to other parts of the system. If you are running an FTP server and need to ensure that a user has access to only FTP services, rather than providing full shell access to the system, this article will walk you through how to restrict aRead More →

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NOTE: this is only if you can’t use apt to clean up due to a 100% full /boot 1. Get the list of kernel images Get the list of kernel images and determine what you can do without. This command will show installed kernels except the currently running one $ sudo dpkg –list ‘linux-image*’|awk ‘{ if ($1==”ii”) print $2}’|grep -v `uname -r` You will get the list of images somethign like below: linux-image-3.19.0-25-generic linux-image-3.19.0-56-generic linux-image-3.19.0-58-generic linux-image-3.19.0-59-generic linux-image-3.19.0-61-generic linux-image-3.19.0-65-generic linux-image-extra-3.19.0-25-generic linux-image-extra-3.19.0-56-generic linux-image-extra-3.19.0-58-generic linux-image-extra-3.19.0-59-generic linux-image-extra-3.19.0-61-generic 2. Prepare Delete Craft a command to delete all files in /boot for kernels that don’t matter to you using brace expansionRead More →