Commands by x3mboy (8)

  • Simple tar

    Simple commant to tar a path


    -2
    tar -cvzf file.tar.gz path
    x3mboy · 2022-09-17 16:40:09 0
  • Sort disk usage from directories

    Sort disk usage from directories in the current directory Show Sample Output


    2
    du --max-depth=1 -h . | sort -h
    x3mboy · 2022-08-23 14:58:57 0
  • Add a DNS server on the fly

    Since systemd-resolved was implemented, add a DNS server have become weirder and harder than before. With this command, you can add a DNS server on-the-fly tied to an specific interface


    5
    sudo systemd-resolve --interface <NombreInterfaz> --set-dns <IPDNS> --set-domain mydomain.com
    x3mboy · 2021-09-21 14:43:48 0
  • Top 10 Memory Processes

    It displays the top 10 processes sorted by memory usage Show Sample Output


    3
    ps aux | sort -rk 4,4 | head -n 10
    x3mboy · 2019-09-26 16:37:33 1
  • Python version to a file

    This command sent the Python version to a file. This is intended to be used in scripts. For some reason, simple redirections didn't work with "python -V" Show Sample Output


    0
    echo "$(python -V 2>&1)" > file
    x3mboy · 2018-11-06 20:52:49 0
  • Sort processes by CPU Usage

    Short list about top 10 processes, sorted by CPU usage Show Sample Output


    3
    ps aux | sort -rk 3,3 | head -n 10
    x3mboy · 2018-10-29 20:00:36 1
  • Show a clock in the upper right corner

    This will use tput to place the command (date %T in this case) in the upper right corner of the terminal


    0
    while sleep 1;do tput sc;tput cup 0 $(($(tput cols)-11));echo -e "\e[31m`date +%T`\e[39m";tput rc;done &
    x3mboy · 2017-11-16 18:07:39 0
  • Find logs modified in the last 15 minutes

    This is a regular find with the -wholename parameter to let it know what name pattern he need to look and then the -mmin -15 to know the last 15 minutes. Show Sample Output


    0
    find /var/log -wholename "*.log" -mmin -15
    x3mboy · 2017-08-03 15:47:43 0

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Display time of accounts connection on a system
Works on CentOS ad OpenBSD too, display time of accounts connection on a system, -p option print individual user's statistics.

Top 10 Memory Processes
It displays the top 10 processes sorted by memory usage

Get the IP address

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Recursive search and replace (with bash only)
Replaces a string matching a pattern in one or several files found recursively in a particular folder.

function to verify an IP address - can be used at the shell prompt or in a shell script
When processing IP addresses in the shell (or shell script) it is useful to be able to verify that the value of data is an IP address (an not some random string or non-sensible IP address).

In-Place search/replace with datestamped backup
Does an in situ search-replace but leaves a datestamped backup. A variation with more precision: sed -i.`date +%Y%m%d%H%M%S 's/pattern/replace' [filename]

Tweak system files without invoking a root shell
only for sudo-style systems. Use this construct instead of I/O re-directors ``>'' or ``>>'' because sudo only elevates the commands and *not* the re-directors. ***warning: remember that the `tee` command will clobber file contents unless it is given the ``-a'' argument Also, for extra security, the "left" command is still run unprivileged.

One liner to kill a process when knowing only the port where the process is running

Calculate N!

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