troubleshooting utilities

troubleshooting utilities

Table: Process and Load Monitoring Utilities

top -	Process activity, dynamically updated	procps
uptime - How long the system is running and the average load	procps
ps - Detailed information about processes	procps
pstree -	A tree of processes and their connections	psmisc (or pstree)
mpstat -	Multiple processor usage	sysstat
iostat -	CPU utilization and I/O statistics	sysstat
sar -	Display and collect information about system activity	sysstat
numastat -	Information about NUMA (Non-Uniform Memory Architecture)	numactl
strace -	Information about all system calls a process makes	strace

Table: Memory Monitoring Utilities

Utility	Purpose	Package
free -	Brief summary of memory usage	procps
vmstat -	Detailed virtual memory statistics and block I/O, dynamically updated	procps
pmap -	Process memory map	procps

Table: I/O Monitoring Utilities

Utility	Purpose	Package
iostat -	CPU utilization and I/O statistics	sysstat
sar -	Display and collect information about system activity	sysstat
vmstat -	Detailed virtual memory statistics and block I/O, dynamically updated	procps

Table: Network Monitoring Utilities

Utility	Purpose	Package
netstat -	Detailed networking statistics	netstat
iptraf -	Gather information on network interfaces	iptraf
tcpdump -	Detailed analysis of network packets and traffic	tcpdump
wireshark -	Detailed network traffic analysis	wireshark