sysctl -w kernel.exec-shield=1
error: “kernel.exec-shield” is an unknown key
How do I fix this problem and make sure exec-shield buffer overflow protection security feature turned on Ubuntu Linux?
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sysctl command
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I‘m trying to use Cinelerra video editing and compositing software under Linux operating systems. However, I’m getting the following error:
MWindow::init_shm: /proc/sys/kernel/shmmax is 0×1000000.
It should be at least 0x7ffffff for cinelerra.
How do I fix this problem?
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How do I find out that how many files are open and how many allowed in Linux server operating systems?
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I setup a CentOS Linux based Linux server running as a gateway and firewall server. However, I’m getting the following messages in the /var/log/messages log file:
Dec 20 00:41:01 fw01 kernel: Neighbour table overflow.
Dec 20 00:41:01 fw01 last message repeated 20 times
OR
Dec 20 00:41:01 fw03 kernel: [ 8987.821184] Neighbour table overflow.
Dec 20 00:41:01 fw03 kernel: [ 8987.860465] printk: 100 messages suppressed.
Why does kernel throw “Neighbour table overflow” messages in syslog? How do I fix this problem under Debian / CentOS / RHEL / Fedora / Ubuntu Linux?
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