Delete files with specified file extension recursively. This is useful when you want to remove those temporary files or those unwanted auto-generated artifacts inside nested folders. Be careful when using these commands because it will delete files permanently Linux Bash find . -type f -name "*.tmp" -delete find . -type f -name "*.tmp" -exec rm -v "{}" + Windows Powershell Get-ChildItem * -Include *.tmp -Recurse | Remove-Item
If you prefer to boot up your Linux machine with the boot messages rather than the distro splash screen. You can enable that by editing the file /etc/default/grub and set the value of GRUB_CMDLINE_LINUX_DEFAULT to an empty string. Example: GRUB_DEFAULT=0 GRUB_TIMEOUT=5 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="" GRUB_CMDLINE_LINUX="" After editing the file, execute update-grub to load your configuration into the bootloader. sudo /usr/sbin/update-grub Output of update-grub Generating grub configuration file ... Found background image: /usr/share/images/desktop-base/desktop-grub.png Found linux image: /boot/vmlinuz-6.1.0-10-arm64 Found initrd image: /boot/initrd.img-6.1.0-10-arm64 Warning: os-prober will not be executed to detect other bootable partitions. Systems on them will not be added to the GRUB boot configuration. Check GRUB_DISABLE_OS_PROBER documentation entry. Adding boot menu entry for UEFI Firmware Settings ... done
I was creating an Active Directory (AD) security auditing tool in Go and Python when I stumbled upon the UserAccountControl flags. This attribute can hold multiple statuses like ACCOUNTDISABLE, NORMAL_ACCOUNT, or DONT_EXPIRE_PASSWORD. It uses a bit-field; a bit-field is a group of bits with each bit representing a value. It is an efficient way of handling multiple statues of a record. A tool that helps identify the property flags. Since a bit-field can hold a range of values, I need a tool that can help me look up the value it represents. I created a simple JavaScript application that converts decimal values and maps them to corresponding property flags. ...
In some situation, we may want to delegate a sudo capability to Linux users or groups without completely giving them full access to the operating system. We can achieve this by using User_Alias inside the /etc/sudoers configuration file. I will share the simple settings that I used in my RHEL server. ## Sudoers allows particular users to run various commands as ## the root user, without needing the root password. ## ## Examples are provided at the bottom of the file for collections ## of related commands, which can then be delegated out to particular ## users or groups. ## ## This file must be edited with the 'visudo' command. ## Host Aliases ## Groups of machines. You may prefer to use hostnames (perhaps using ## wildcards for entire domains) or IP addresses instead. # Host_Alias FILESERVERS = fs1, fs2 # Host_Alias MAILSERVERS = smtp, smtp2 ## User Aliases ## These aren't often necessary, as you can use regular groups ## (ie, from files, LDAP, NIS, etc) in this file - just use %groupname ## rather than USERALIAS # User_Alias ADMINS = jsmith, mikem User_Alias POWERUSERS = piotr.pawlowski, martin.marshall POWERUSERS ALL=(ALL) NOPASSWD: /sbin/reboot ## Command Aliases ## These are groups of related commands... ## Networking # Cmnd_Alias NETWORKING = /sbin/route, /sbin/ifconfig, /bin/ping, /sbin/dhclient, /usr/bin/net, /sbin/iptables, /usr/bin/rfcomm, /usr/bin/wvdial, /sbin/iwconfig, /sbin/mii-tool ## Installation and management of software # Cmnd_Alias SOFTWARE = /bin/rpm, /usr/bin/up2date, /usr/bin/yum ## Services # Cmnd_Alias SERVICES = /sbin/service, /sbin/chkconfig, /usr/bin/systemctl start, /usr/bin/systemctl stop, /usr/bin/systemctl reload, /usr/bin/systemctl restart, /usr/bin/systemctl status, /usr/bin/systemctl enable, /usr/bin/systemctl disable ## Updating the locate database # Cmnd_Alias LOCATE = /usr/bin/updatedb ## Storage # Cmnd_Alias STORAGE = /sbin/fdisk, /sbin/sfdisk, /sbin/parted, /sbin/partprobe, /bin/mount, /bin/umount ## Delegating permissions # Cmnd_Alias DELEGATING = /usr/sbin/visudo, /bin/chown, /bin/chmod, /bin/chgrp ## Processes # Cmnd_Alias PROCESSES = /bin/nice, /bin/kill, /usr/bin/kill, /usr/bin/killall ## Drivers # Cmnd_Alias DRIVERS = /sbin/modprobe # Defaults specification # # Refuse to run if unable to disable echo on the tty. # Defaults !visiblepw # # Preserving HOME has security implications since many programs # use it when searching for configuration files. Note that HOME # is already set when the the env_reset option is enabled, so # this option is only effective for configurations where either # env_reset is disabled or HOME is present in the env_keep list. # Defaults always_set_home Defaults match_group_by_gid # Prior to version 1.8.15, groups listed in sudoers that were not # found in the system group database were passed to the group # plugin, if any. Starting with 1.8.15, only groups of the form # %:group are resolved via the group plugin by default. # We enable always_query_group_plugin to restore old behavior. # Disable this option for new behavior. Defaults always_query_group_plugin Defaults env_reset Defaults env_keep = "COLORS DISPLAY HOSTNAME HISTSIZE KDEDIR LS_COLORS" Defaults env_keep += "MAIL PS1 PS2 QTDIR USERNAME LANG LC_ADDRESS LC_CTYPE" Defaults env_keep += "LC_COLLATE LC_IDENTIFICATION LC_MEASUREMENT LC_MESSAGES" Defaults env_keep += "LC_MONETARY LC_NAME LC_NUMERIC LC_PAPER LC_TELEPHONE" Defaults env_keep += "LC_TIME LC_ALL LANGUAGE LINGUAS _XKB_CHARSET XAUTHORITY" # # Adding HOME to env_keep may enable a user to run unrestricted # commands via sudo. # # Defaults env_keep += "HOME" Defaults secure_path = /sbin:/bin:/usr/sbin:/usr/bin ## Next comes the main part: which users can run what software on ## which machines (the sudoers file can be shared between multiple ## systems). ## Syntax: ## ## user MACHINE=COMMANDS ## ## The COMMANDS section may have other options added to it. ## ## Allow root to run any commands anywhere root ALL=(ALL) ALL ## Allows members of the 'sys' group to run networking, software, ## service management apps and more. # %sys ALL = NETWORKING, SOFTWARE, SERVICES, STORAGE, DELEGATING, PROCESSES, LOCATE, DRIVERS ## Allows people in group wheel to run all commands %wheel ALL=(ALL) ALL ## Same thing without a password # %wheel ALL=(ALL) NOPASSWD: ALL ## Allows members of the users group to mount and unmount the ## cdrom as root # %users ALL=/sbin/mount /mnt/cdrom, /sbin/umount /mnt/cdrom ## Allows members of the users group to shutdown this system # %users localhost=/sbin/shutdown -h now %psi ALL=(ALL) NOPASSWD: /bin/systemctl start db-replication.service %psi ALL=(ALL) NOPASSWD: /bin/systemctl stop db-replication.service %psi ALL=(ALL) NOPASSWD: /bin/systemctl restart db-replication.service %psi ALL=(ALL) NOPASSWD: /bin/systemctl status db-replication.service ## Read drop-in files from /etc/sudoers.d (the # here does not mean a comment) #includedir /etc/sudoers.d The configuration before handles the individual User_Alias. It assigns users under the alias name POWERUSERS and we let those user reboot the system without asking for password. ...
Systemd is a Linux software suite that handles system services (daemon) and timers; it enables you to start, stop and restart your application using systemctl command. It can also start your application during operating systems boot-up sequence. Note that you will need to have root or sudo privileges for this operation. To create a systemd unit file, create a service file inside the directory /etc/systemd/system/. The filename must end with .service for example: ...
Systemd is a Linux software suite that handles system services (daemon) and timers; it enables you to start, stop and restart your application using systemctl command. It can also start your application during operating systems boot-up sequence. Note that you will need to have root or sudo privileges for this operation. To create a systemd unit file, create a service file inside the directory /etc/systemd/system/. The filename must end with .service for example: ...
Revive your old laptop back in service using Lubuntu a light-weight version of Ubuntu. I bought this Lenovo IdeaPad S10-3 in 2012 when I was working in Muscat, Oman. This netbook has a blazing Intel Atom processor 1.66GHz, a 2GB DDR3 RAM, and 10″ LCD screen. I was initially thinking of giving it away because when I installed Ubuntu or CentOS it is sluggish and keeps on lagging. Then I stumble upon Lubuntu when I was researching about smallest Linux distribution. Note that Lubuntu is not a tiny as TinyCore or Damn Small Linux but for my case Lubuntu it is more than enough. ...
You may want to completely erase the partition table of your USB flash drive, including the boot record. In macOS you do easily do that using diskutil. During this COVID-19 lockdown in Malaysia, I wanted to use my weekend time in installing Linux on an old laptop. It turns out that old laptop only supports MBR and not GPT boot record and FAT32 instead of EX-FAT. I have to then delete the partition table from GPT to MBR and load LUBUNTU Linux distribution into the flash drive using Unetbootin. ...
I saw neofetch on reddit. I installed it on my Ubuntu box. It is a really nice looking command line system information tool. I can now show it off to Windows Admin here in the office. Neofetch – A command-line system information tool written in bash 3.2+ Neofetch Screenshot
Here’s the simple steps for you to connect to a Cisco VPN in Ubuntu 18.04 LTS. Cisco, an American company is the leading provider and manufacturer of enterprise network devices, telecommunication hardware, networking security and networking software. According to smartprofile.io as of April 2018, Cisco holds a 73.9% market which makes it the undisputed leader in its industry. Without further ado here are the steps. Install vpnc and network-manager-vpnc-gnome ...