by Ras
28. March 2012 02:34
Below commands are very useful for troubleshooting and finding information about a linux system
lsdev This command will list all the devices
lspci This command will list all of the PCI devices
lsusb This command will list all USB devices
lsmod This command will list all Modules
lsof This command will list all of the Open Files
cat /etc/ld.so.conf This will show all loaded libraries
ldconfig If you change /etc/ld.so.conf use this to load it after change
sysctl changes settings on /proc/sys/ directories and files
/etc/logins.def Some useful default values for various programs such as useradd and password expiry
/etc/profile Set the shell variables PATH, USER, MAIL, HOSTNAME and HISTSIZE (system-wide environment variables)
/etc/bash.bashrc Similar to /etc/profile but you have to invoke it manually by running bash
cat /etc/sysctl.conf Various Linux networking and system settings
sysctl -p /etc/sysctl2.conf Load sysctl settings from a file
sysctl -w kernel.domainname="blah.com" Change one setting in sysctl
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