Linux command to check hardware

Handy bash commands for finding out stuff in Linux:


# Find CPU specifications

cat /proc/cpuinfo



# Find running kernel version

uname -r



# What compiler version do I have installed

gcc -v

gcc --version



# What is the running kernel and compiler installed

cat /proc/version



# Find X server version

X -showconfig



# What pci cards are installed and what irq/port is used

cat /proc/pci



# What kernel modules are loaded

lsmod



# Memory and swap information

cat /proc/meminfo

free

An article: Tips for Optimizing Linux Memory



# How are the hard drives partitioned

fdisk -l



# How much free/used drive space

df -h



# Show disk usage by current directory and all subdirectories

du
less



# What takes up so much space on your box

# Run from the directory in question and the largest chunk shows up last

find $1 -type d
xargs du -sm
sort -g



# What is the distribution

cat /etc/.product

cat /etc/.issue

cat /etc/issue

cat /etc/issue.net

sysinfo



# For finding or locating files

find

locate

which

whereis



# Use dmesg to view the kernel ring buffer (error messages)

dmesg
less



# Watch error messages as they happen (sysklog needed)

as root, tail -f /var/log/messages (shows last 10 lines, use a number in front of f for more lines)



# What processes are running

ps -A



# Find a process by name

ps -ef
grep -i

For example, XCDroast

ps -ef xcdroast



# See current environment list, or pipe to file

env
more

env > environmentvariablelist.txt



# Show current userid and assigned groups

id



# See all command aliases for the current user

alias



# See rpms installed on current system

rpmquery --all
less

rpmquery --all >

rpmquery --all
grep -i

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