Linux Partial system commands

See some system commands on the Internet, put a note

# uname-a               # View kernel/Os/cpu info # head-n 1/etc/issue   # view OS version # Cat/proc/cpuinfo      # View CPU Info # hostname               # View Meter Computer name # LSPCI-TV              # List all PCI devices # LSUSB-TV              # list all USB devices # Lsmod                  # list loaded kernel modules # env                    # View Environment variables

Resources

# free-m                # View memory usage and swap usage # df-h                  # View each partition usage # du-sh < directory name >        # View the size of the specified directory # grep memtotal/proc/meminfo
   # View Total Memory # grep memfree/proc/meminfo    # View Idle amount # Uptime                 # View System uptime, number of users, load # CAT/PROC/LOADAVG      # View System load

Disks and partitions

# Mount | Column-t      # View attached partition status # fdisk-l               # View all partitions # swapon-s              # View all swap partitions # hdparm-i/DEV/HDA     # View disk parameters (IDE devices only) # DM ESG | grep IDE       # view IDE Device detection status at startup

Internet

# ifconfig               # View the properties of all network Interfaces # iptables-l            # View firewall settings # route-n               # View routing table # NETSTAT-LNTP          # View all listening ports # NETSTAT-ANTP          # View all established connections # NETSTAT-S             # View Network statistics

Process

# ps-ef                 # View All Processes # Top                    # Real-time display process status

User

# w                      # View active user # ID < username >            # View specified user information # Last                   # View user log in log # cut-d:-f1/etc/passwd   # View system All users # cut-d: -f1/etc/group    # View system All groups # Crontab-l             # View Current user's scheduled tasks

Service

# chkconfig--list       # List all system Services # Chkconfig--list | grep    on # List all started system services

Program

# RPM-QA                # View all installed Packages