Linux Commands

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Contents 1 GENERAL 2 PROCESS RELATED 3 Software Management 4 File System 5 File Copy 6 proc file system 7 HARDWARE 8 Kernel 9 Server Administration

GENERAL

• unset HISTFILE
• find
• crontab
• bind
• ab
• apropos
• ssh
• screen
• vi
• tar
• replace
• mkpasswd
• ntpdate
• mail
• sendmail
• diff
• useradd
• logrotate
• split

PROCESS RELATED

• pidof
• pgrep
• pkill
• kill
• top

Software Management

• yum
• rpm
• up2date

File System

• du Find disk usage
• swapon swap space
• smartctl check hard disk health
• mount

File Copy

• scp
• rsync
• lftp - command line ftp software with many advanced features
• ncftp
• svn

System Performance/Server load

• ps
• mpstat
• vmstat
• sysstat
• iostat
• sar
• strace
• lsof

Network

• iptables - firewall on linux
• nmap - scan open ports on a server
• vnstat - keep track of bandwidth usage
• iftop - shows bandwidth usage like top
• mii-tool - shows network info
• ethtool - Display or change ethernet card settings
• tcpdump
• mrtg

Services

• squid - is a proxy server

proc file system

• meminfo

HARDWARE

• lspci
• dmidecode

Kernel

• lsmod
• kernel

Server Administration

• How to list all process by a user
• How to kill all process by a user
• Remove duplicate lines with uniq