Monitoring tools in Linux

Features of network monitoring tools A network monitoring tool is usually hosted on a standalone server and runs its client software on each machine to be managed or monitored. The tool usually runs its own copy of the database such as MySQL or Postgres, which stores all scripts, historic events and actions. In some modern...

More Linux system commands

Tool   Most useful tool function top- Process activity vmstat- System activity. Hardware and system information uptime,w- Average system load pe. pstree- Displays the processes free- Memory usage iostat- Average CPU load. desk activity sar- Collect and report system activity mpstat- Multiprocessor usage numastat- NUMA-reLated statistics pmap- Proces, memory usage netstat- Network...

LINUX DIRECTORY STRUCTURE

The following show you the Linux Directory structure and default programs/scripts you can run through...

BASH COMMANDS starts - A,B,C,D,E

A alias: If creating an alias is what you want, then this is it. apropos: We’re not the only ones providing help. This command you to search through the Help manual pages. apt-get: This one works on Debian and Ubuntu distros. It is used to install and search for software packages. aptitude: See the similarity with the above command? This one does the same thing. aspell: Got bad spellings? Use the...

BASH COMMANDS starts - F,G,H,I,J,K,L

F false: Do nothing, unsuccessfully fdformat: This command is used for low level format of a floppy disk. fdisk: This is a partition table manipulator for Linux systems. fg: This command is used for sending a task to the foreground. fgrep: Use this command to search through files for tasks that match a string. file: This is used to determine the file type. find: This is used to find files that match...

BASH COMMANDS starts - M,N,O,P,Q

N netstat: Get information on networking. nice: Use this to set the priority of a job or a command. nl: Write files and number lines. nohup: This one runs a command, which is not affected by hangups. notify-send: This command sends desktop notifications. nslookup: This command is used to query internet name servers interactively. O open: This command opens a file in its default application. op:...

BASH COMMANDS starts - R,S,T,U

R ram: Ram disk device rcp: When using two machines, this command copies files between them. read: This commands is used for reading a line from standard input. readarray: This commands reads from stdin into an array variable. readonly: This command marks the variables and functions as readonly. reboot: Self explanatory, use this command to reboot your system. rename: Rename files renice: This command...

BASH COMMANDS starts - V,W,X,Y

V v: This command lists the contents of a directory. vdir: Same as above. vi: This is a text editor. vmstat: This command will report on the virtual memory statistics. W wait: This command directs the system to wait for a process to finish. watch: This command will display or execute a program periodically. wc: This command prints the word, byte and line counts. whereis: This command will search...

Switching between shells in linux

Linux/Unix Shell is compact closure of system utilities,calls,kernel which can be ported and command using shell commands. Different commands can be input through this where different hardware signals are been triggered in order to work on specific hardware task through linux hardware. Although bash, the default shell on...

Swift by APPLE

Swift is an innovative new programming language for Cocoa and Cocoa Touch. Writing code is interactive and fun, the syntax is concise yet expressive, and apps run lightning-fast. Swift is ready for your next iOS and OS X project — or for addition into your current app — because Swift code works side-by-side with Objec...

Cron Jobs

The software utility Cron is a time-based job scheduler in Unix-like computer operating systems. People who set up and maintain software environments use cron to schedule jobs (commands or shell scripts) to run periodically at fixed times, dates, or intervals. It typically automates system maintenance or administration—though...

Different types of LINUX File system

These are examples include linux file systems.  FAT (FAT12, FAT16, FAT32) , ext2, ext3, ext4, XFS, btrfs, ISO 9660, Files-11, Veritas File System, ZFS,  Some disk file systems are journaling file systems or versioning file systems. FAT: File Allocation Table (FAT) is a computer file system architecture and a family of industry-standard file...

du / df commands in linux

1. df df command can get how much space is occupied and  how much availabe space is left, it cal also display the usage information for both inode and disk blocks. df options: -a: show all file system disk usage -k: display output in K bytes -i: display inode infomation -t:Display disk space usage for each of the specified type of File system -T: display file system type Sample outputs: Display...

linux disk management

The disk is a very important hardware resource in Linux system, how to manage them effectively is directly related to performance of the whole system. If you have some experiences on the Linux disk management  and should know that “df”, “du” and “fdisk” these three commands: df is used to check the file system disk usage,...

TC Protocol - TCP/IP of network list for any OS

1 tcpmux TCP Port Service Multiplexer 2 compressnet Management Utility 3 compressnet Compression Process 5 rje Remote Job Entry 7 echo Echo 9 discard Discard 11 systat Active Users 13 daytime Daytime (RFC 867) 15 netstat netstat 15/tcp 17 qotd Quote of the Day 18 msp Message Send Protocol 19 chargen Character Generator 20 ftp-data File Transfer [Default Data] 21 ftp File Transfer [Control] 22 ssh...