By default, fedora disables the SYSRQ functionality of the kernel, for some reason. To enable it, either add sysrq_always_enabled at the end of your kernel line in \/boot\/grub\/menu.conf, or edit \/etc\/sysctl.conf, changing
\n[sourcecode language=’bash’]kernel.sysrq = 0[\/sourcecode]
\nto
\n[sourcecode language=’bash’]kernel.sysrq = 1[\/sourcecode]<\/p>\n
Some kernel updates on fedora also have the tendency to write to swap needlessly, even though you have loads of RAM available, to stop this, edit \/etc\/sysctl.conf again, and add the following two lines
\n[sourcecode language=’bash’]# Controls the swapiness of the machine
\nvm\/swappiness = 0[\/sourcecode]
\nTo just temporarily disable it, do
\n[sourcecode language=’bash’]echo -n 0 > \/proc\/sys\/vm\/swappiness[\/sourcecode]
\nas root<\/p>\n
***These tips are applicable to almost any GNU\/Linux distribution, not necessarily for Fedora alone<\/p>\n","protected":false},"excerpt":{"rendered":"
By default, fedora disables the SYSRQ functionality of the kernel, for some reason. To enable it, either add sysrq_always_enabled at the end of your kernel line in \/boot\/grub\/menu.conf, or edit \/etc\/sysctl.conf, changing [sourcecode language=’bash’]kernel.sysrq = 0[\/sourcecode] to [sourcecode language=’bash’]kernel.sysrq = 1[\/sourcecode] Some kernel updates on fedora also have the tendency to write to swap needlessly, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[11,10],"tags":[17,102,101,100,99],"class_list":["post-488","post","type-post","status-publish","format-standard","hentry","category-gen-sab-fed","category-linux","tag-fedora","tag-kernel-sysrq","tag-no-need-to-swap","tag-swap","tag-sysrq"],"aioseo_notices":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pqtyx-7S","jetpack-related-posts":[{"id":893,"url":"https:\/\/judepereira.com\/blog\/coloured-varlogmessages-at-tty12\/","url_meta":{"origin":488,"position":0},"title":"Coloured \/var\/log\/messages at tty12","author":"Jude Pereira","date":"April 26, 2011","format":false,"excerpt":"Reading logs could never become any more easier, at just a keystroke, you have your logs displayed where you want, in some fancy colour. They look great too. TTY's can be accessed by pressing Alt + Ctrl + F[1 - 12] simultaneously. 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