Don’t look at the “Mem” line, look at the one below it. The Linux kernel consumes as much memory as it can to provide the I/O cache (and other non-critical buffers, but the cache is going to be most of this usage). This memory is relinquished to processes when they request it. The “-/+ buffers/cache” … Read more
You can specify any extra header you may need with -a $mail -s “Some random subject” -a “From: some@mail.tld” to@mail.tld
You can put something like this in the crontab file: 00 09 * * 7 [ $(date +\%d) -le 07 ] && /run/your/script The date +%d gives you the number of the current day, and then you can check if the day is less than or equal to 7. If it is, run your command. … Read more
To fix this problem, you have to install OpenSSL development package, which is available in standard repositories of all modern Linux distributions. To install OpenSSL development package on Debian, Ubuntu or their derivatives: $ sudo apt-get install libssl-dev To install OpenSSL development package on Fedora, CentOS or RHEL: $ sudo yum install openssl-devel Edit : … Read more
You can pipe your output to awk to print just the PID. For example: ps -ef | grep nginx | awk ‘{print $2}’ 9439
Um, lets not forget sort –random-sort
yum uses RPM, so the following command will list the contents of the installed package: $ rpm -ql package-name
You can add it to your shell configuration file, e.g. $HOME/.bashrc or more globally in /etc/environment. After adding these lines the changes won’t reflect instantly in GUI based system’s you have to exit the terminal or create a new one and in server logout the session and login to reflect these changes.
Please go through this article. You may find this very useful: https://web.archive.org/web/20210506080335/https://mah.everybody.org/docs/ssh Just in case the above link vanishes some day, I am capturing the main piece of the solution below: This solution from Joseph M. Reagle by way of Daniel Starin: Add this following to your .bash_profile SSH_ENV=”$HOME/.ssh/agent-environment” function start_agent { echo “Initialising new … Read more