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Vi Editior How to copy data in VI editor vi first edit source file then move your cursor to start of selection ma mark current position with letter a then move your cursor to end of selection y’a yank to buffer x from current position to mark a :e other edit target file move […] Memory commands How do I find out System / Server Memory Utilization under RHEL / CentOS / any other Linux distribution? A. You need to use free command which, displays the total amount of free and used physical and swap memory in the system, as well as the buffers used by the kernel. free […] CPU COMMAND PU COMMAND 10 cpu usage command ps -e -o pcpu,cpu,nice,state,cputime,args –sort pcpu | sed ‘/^ 0.0 /d’ ####Watch changeable data continuously watch -n.1 ‘cat /proc/interrupts’ cat /proc/interrupts Check CPU Temperature # echo `date +%b-%d-%H:%M:%S` | tr -d ‘\ 012’ ; echo -n ‘ ‘; sensors | awk ‘/CPU Temp:/{ print $3 }’ […] Linux System Monitoring Commands #1: top – Process Activity Command Commonly Used Hot Keys The top command provides several useful hot keys: Hot Key Usage t Displays summary information off and on. m Displays memory information off and on. A Sorts the display by top consumers of various system resources. Useful for quick identification of […] Grep Command some examples of grep command: * Print Apache’s documentroot directory name: $ grep -i documentroot /etc/httpd/conf/httpd.conf * View file contents without comments and empty lines: $ grep -Ev “^$|^#” /etc/my.cnf * print only IP address assigned to the interface: $ ifconfig eth0 | grep ‘inet addr:’ | cut -d’:’ -f2 | awk […] FIND Command Find is a versatile tool which can be used to locate files and directories satisfying different user criteria. But the sheer number of options for this command line tool makes it at the same time both powerful and encumbering for the user. Here I will list a few combinations which one can […] |
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