linux - What does Virtual memory size in top mean? - Server Fault
Linux supports virtual memory, that is, using a disk as an extension of RAM so that the effective size of usable memory grows correspondingly. The kernel will write the contents of a currently unused block …
Check if port is open or closed on a Linux server?
Sep 7, 2011 · You can check if a process listens on a TCP or UDP port with ss -tuplen (replacement of netstat). To check whether some ports are accessible from the outside (this is probably what you …
linux - How to check disk I/O utilization per process? - Server Fault
I'm having a problem with a Linux system and I have found sysstat and sar to report huge peaks of disk I/O, average service time as well as average wait time. How could I determine which process is
Linux: using find to locate files older than <date>
Not directly related to question, but might be interesting for some that stumble here. find command doesn't directly support -older parameter for finding files older than some required date, but you can …
Filename length limits on linux? - Server Fault
May 18, 2009 · Are there any filename or path length limits on Linux?
linux - When does /tmp get cleared? - Server Fault
May 29, 2015 · That depends on your distribution. On some systems, it's deleted only when booted; others have cron jobs deleting items older than n hours. On Debian and derivatives On Debian and …
linux - How do I verify the speed of my NIC? - Server Fault
Nov 30, 2010 · I just installed a new gigabit network interface card (NIC) in Linux. How do I tell if it is really set to gigabit speeds? I see ethtool has an option to set the speed, but I can't seem to figure...
linux - Deleting All Partitions From the Command Line - Server Fault
Mar 23, 2011 · How do you delete all partitions on a device from the command line on Linux (specifically Ubuntu)? I tried looking at fdisk, but it presents an interactive prompt. I'm looking for a single …
linux - How do I log every command executed by a user? - Server Fault
I want to monitor all user's activity in my server. Even when the user executes a shell command from some editor like vim I want to see them in the log file. I have checked the tool acct but it i...
Send test mail using telnet via smtps (465) port - Server Fault
Oct 24, 2020 · Linux: Debian and Ubuntu Package telnet-ssl provides telnet variant with ssl support. It supports command line like below: telnet-ssl -z ssl smtp.gmail.com 465 One on a few alternatives is …