os: ubuntu2204 -- 配置和常用脚本

os:  ubuntu2204 -- 配置和常用脚本

 

 

 

 

一、配置（/etc/profile）

[wit@on:null]$ cat  /etc/profile
# /etc/profile: system-wide .profile file for the Bourne shell (sh(1))
# and Bourne compatible shells (bash(1), ksh(1), ash(1), ...).

if [ "${PS1-}" ]; then
  if [ "${BASH-}" ] && [ "$BASH" != "/bin/sh" ]; then
    # The file bash.bashrc already sets the default PS1.
    # PS1='\h:\w\$ '
    if [ -f /etc/bash.bashrc ]; then
      . /etc/bash.bashrc
    fi
  else
    if [ "$(id -u)" -eq 0 ]; then
      PS1='# '
    else
      PS1='$ '
    fi
  fi
fi

if [ -d /etc/profile.d ]; then
  for i in /etc/profile.d/*.sh; do
    if [ -r $i ]; then
      . $i
    fi
  done
  unset i
fi
[wit@on:null]$ 
[wit@on:null]$ 

 

 

 

 

二、配置（ /etc/bash.bashrc ）

[wit@on:null]$ cat  /etc/bash.bashrc 
# System-wide .bashrc file for interactive bash(1) shells.

# To enable the settings / commands in this file for login shells as well,
# this file has to be sourced in /etc/profile.

# If not running interactively, don't do anything
[ -z "$PS1" ] && return

# check the window size after each command and, if necessary,
# update the values of LINES and COLUMNS.
shopt -s checkwinsize

# set variable identifying the chroot you work in (used in the prompt below)
if [ -z "${debian_chroot:-}" ] && [ -r /etc/debian_chroot ]; then
    debian_chroot=$(cat /etc/debian_chroot)
fi

# set a fancy prompt (non-color, overwrite the one in /etc/profile)
# but only if not SUDOing and have SUDO_PS1 set; then assume smart user.
if ! [ -n "${SUDO_USER}" -a -n "${SUDO_PS1}" ]; then
  PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
fi

# Commented out, don't overwrite xterm -T "title" -n "icontitle" by default.
# If this is an xterm set the title to user@host:dir
#case "$TERM" in
#xterm*|rxvt*)
#    PROMPT_COMMAND='echo -ne "\033]0;${USER}@${HOSTNAME}: ${PWD}\007"'
#    ;;
#*)
#    ;;
#esac

# enable bash completion in interactive shells
#if ! shopt -oq posix; then
#  if [ -f /usr/share/bash-completion/bash_completion ]; then
#    . /usr/share/bash-completion/bash_completion
#  elif [ -f /etc/bash_completion ]; then
#    . /etc/bash_completion
#  fi
#fi

# sudo hint
if [ ! -e "$HOME/.sudo_as_admin_successful" ] && [ ! -e "$HOME/.hushlogin" ] ; then
    case " $(groups) " in *\ admin\ *|*\ sudo\ *)
    if [ -x /usr/bin/sudo ]; then
        cat <<-EOF
        To run a command as administrator (user "root"), use "sudo <command>".
        See "man sudo_root" for details.

        EOF
    fi
    esac
fi

# if the command-not-found package is installed, use it
if [ -x /usr/lib/command-not-found -o -x /usr/share/command-not-found/command-not-found ]; then
        function command_not_found_handle {
                # check because c-n-f could've been removed in the meantime
                if [ -x /usr/lib/command-not-found ]; then
                   /usr/lib/command-not-found -- "$1"
                   return $?
                elif [ -x /usr/share/command-not-found/command-not-found ]; then
                   /usr/share/command-not-found/command-not-found -- "$1"
                   return $?
                else
                   printf "%s: command not found\n" "$1" >&2
                   return 127
                fi
        }
fi
[wit@on:null]$ 
[wit@on:null]$ 

 

 

 

 

三、ubuntu 系统更新脚本（update）

#!/usr/bin/env bash




# file_name = update




echo
echo -- update --

echo "ROOT_MIMA" | sudo -S date;
echo "ROOT_MIMA" | sudo -S apt update -y;
echo "ROOT_MIMA" | sudo -S apt upgrade -y;
echo "ROOT_MIMA" | sudo -S apt update -y;
echo "ROOT_MIMA" | sudo -S apt autoclean -y;
echo "ROOT_MIMA" | sudo -S apt autoremove -y;

echo -- update end --
echo

 

 

 

 

四、ubuntu 移除旧内核脚本（remove_old_kernel_ubuntu）

#!/usr/bin/env bash




# filename = remove_old_kernel_ubuntu




# remove_old_kernel_ubuntu_help

function remove_old_kernel_ubuntu_help()
{

     echo
        echo
        echo -e  "\n\t== remove_old_kernel_ubuntu_help: begin =="
        echo -e  '  command                        parameter1              function'
        echo -e  '  remove_old_kernel_ubuntu       null                    -- List all kernel files installed.'
        echo -e  '  remove_old_kernel_ubuntu       kernel-old-version      -- Remove the kernel files matched with "kernel-old-version" .'
        echo
        echo -e  '  == examples =='
        echo -e  '  remove_old_kernel_ubuntu                               List all kernel files installed. '
        echo -e  '  remove_old_kernel_ubuntu       6.2.0-36        Remove kernel files matched with "6.2.0-36" .'
        echo -e  '  [wit@on:tools]$  ./remove_old_kernel_ubuntu  6.2.0-36'
        echo -e  "\t== remove_old_kernel_ubuntu_help: begin ==\n"
        echo
        echo


}



# display kernel files by current using

function current_use_kernel()
{

    echo -e  "\n\t-- current_use_kernel: begin --";

        msg=$(echo "ROOT_MIMA" | sudo -S uname -srmo)
        echo -e "\t\t" ${msg}

    echo -e  "\t-- current_use_kernel: end --\n";

}




# list kernel files and return a parameter of type of array.

function list_kernel()
{

    echo -e "\n\t-- list_kernel: begin --";
    
    i=1
    for f in $(echo "ROOT_MIMA" | sudo -S dpkg  --get-selections | grep -E "^linux" | awk '{ print $1}')
    do
        echo -e "\t\tLIST_FILE_$i := " ${f}
        i=$(($i+1))
    done

    echo -e "\t-- list_kernel: over --\n";

}





# delete files of old kernels

function delete_old_kernel_files()
{


    if [ $1 ]
    then

        echo -e "\n\t-- delete_old_kernel_files: begin --";

        echo -e "\n\t\tREMOVLE_OLD_KERNEL := " $1 "\n"

        kernel_files=$(echo "ROOT_MIMA" | sudo -S dpkg  --get-selections | grep -E "^linux.*$1-?*" | awk '{ print $1}')

        i=1
        for f in ${kernel_files}
        do
            echo -e "\n\n\t\tDELETE_FILE_$i := " ${f} "\n"
            echo "ROOT_MIMA" | sudo -S apt purge -y ${f}
            i=$(($i+1))
        done

        echo -e "\t-- delete_old_kernel_files: over --\n";

    else

        echo -e "\t[ ERROR ]:\t" "\$1 is NULL, this programe is over !"
        exit 3

    fi

}




# fina_work():  remove old information of old kernel, and then clean, and then update-grub

function final_work()
{

    echo -e "\n\t-- final_work: begin --\n";
        #clean_files=$(echo "ROOT_MIMA" | sudo -S dpkg --get-selections | grep linux | grep reinstall | awk '{ print $1}')
     clean_files=$(echo "ROOT_MIMA" | sudo -S dpkg --get-selections | grep linux | grep reinstall | awk '{ print $1}')

    if [ ${clean_files} ]
    then
        for f in ${clean_files}
        do
            echo echo "ROOT_MIMA" | sudo -S dpkg -P ${f}
        done
    fi

    echo "ROOT_MIMA" | sudo -S apt autoremove -y;
    #echo "ROOT_MIMA" | sudo -S update-grub;

    echo -e "\n\t-- final_work: over --\n";
}




# run

function run()
{
    
    echo    
    echo -e "\n== remove_old_kernel_ubuntu: begin ==\n";


        # remove_old_kernel_ubuntu_help
            remove_old_kernel_ubuntu_help

        # display current kernel
            current_use_kernel

        # list all files of kernel
            list_kernel

        # delete all files of kernel
        if [ $1 ]
        then
            delete_old_kernel_files $1

            # final_work
            final_work
        fi

        # list all files of kernel
            list_kernel

        # display current kernel
            current_use_kernel

    echo -e "\n== remove_old_kernel_ubuntu: over ==\n";
    echo    

}




run $1

 

 

 

 

五、参考文档

 

　　1、os：ubuntu2204 -- 删除“旧内核”脚本　　https://www.cnblogs.com/lnlidawei/p/17814188.html