Latest revision as of 09:19, 11 February 2025

echo 1 > /proc/sys/kernel/sysrq
echo b > /proc/sysrq-trigger

ulimit -Sv 12000000: Set max memory to use to 12GB for this process (with option to increase (-S))

cp -rL: Copy recursively and dereference symbolic links (copy the file, not the link)

top: List process resource usage. By default having the most CPU-intensive process on top. Press > to have it sort on another column. Press 1 to have usage for each CPU apart.

cat /etc/sysctl.conf|grep swappiness: Check swappines (the eager the system will swap with). A higher number means more swapping will happen. 0 is not no swapping but minimal swapping.

PS1="[\u@\h \W]\$ ": Set shell prompt to '[username@hostname <curdir>]$ '; \w for whole current path

Debian

for file in /proc/*/status ; do awk '/VmSwap|Name/{printf $2 " " $3}END{ print ""}' $file; done: Find swapspace usage per process

In /etc/lightdm/lightdm.conf comment this line out (by putting a # in front of it)

lightdm.conf:autologin-user=pi

@@ Line 1: / Line 1: @@
 [[Category:Linux/Unix]]
+;Force a reboot (e.g. when mount commands are hanging)
+<syntaxhighlight lang=bash>
+echo 1 > /proc/sys/kernel/sysrq
+echo b > /proc/sysrq-trigger
+</syntaxhighlight>
+;ulimit -Sv 12000000
+:Set max memory to use to 12GB for this process (with option to increase (-S))
 ;cp -rL
@@ Line 28: / Line 37: @@
 :Set shell prompt to '[username@hostname <curdir>]$ '
 :\w for whole current path
+=Debian=
+;/var/run/reboot-required
+:If this file exists a reboot is required
 =RedHat (RHEL)=
@@ Line 40: / Line 53: @@
 ;yum install <packagename>
-:Install a package from a rmp-server
+:Install a package from a rpm-repository
+;rpm -qa
+:List all installed packages. Add -i for details
+;rpm -ivh <rpm-file>
+:Install package in rpm-file
+;rpm -Uvh <rpm-file>
+:Update package in rpm-file
 =Bash=