删除用户脚本.sh

#!/bin/bash
#
# Delete_User - Automates the 4 steps to remove an account
#
#################################################################
# 
# Define Functions
#
#################################################################
function get_answer {
#unset ANSWERASK_COUNT=0
#while [ -z "$ANSWER" ] # while no answer is given, keep askingdoASK_COUNT=$[ $ASK_COUNT + 1 ]
#case $ASK_COUNT in			# If user gives no answer in time allowed2)echo echo "Please answer the question."echo;;3)echo echo "One last try... please answer the question."echo;;4)echo echo "Since you refuse to answer the question..."echo "exiting program."echo#exit;;esac
#echo
#	if [ -n "$LINE2" ]thenecho $LINE1			# Print 2 linesecho -e $LINE2" \c"else					# Print 1 lineecho -e $LINE1" \c"fi
#
# Allow 60 seconds to answer before time-outread -t 60 ANSWERdone
#
# Do a little variable clean-up
#unset LINE1unset LINE2
#
}    #end of get_answer function
#
#################################################################
function process_answer {
#case $ANSWER iny|Y|YES|yes|yEs|yeS|YEs|yES)# If user answers "yes".do nothing.;;*)# If user answers anything but "yes", exit scriptechoecho $EXIT_LINE1echo $EXIT_LINE2echoexit;;esac## Do a little variable clean-upunset EXIT_LINE1unset EXIT_LINE2
#
} #End of process_answer function
#
################################################################
#
# End of Function Definitions
#
############### Main Script #################################
#
# Get name of User Account to check
#
echo "Step #1 - Determine User Account name to delete "
echo
LINE1="Please enter the username of the user"
LINE2="account you wish to delete from system:"
get_answer
USER_ACCOUNT=$ANSWER
#
# Double check with script user that this is the correct User Account
#
LINE1="Is $USER_ACCOUNT the user account"
LINE2="you wish to delete from the system?[ y/n ]:"
get_answer
#
############################################################
#
# Check that USER_ACCOUNT is really an account on the system
#
USER_ACCOUNT_RECORD=$(cat /etc/passwd | grep -w $USER_ACCOUNT)
#
if [ $? -eq 1 ]			# If the account is not found, exit script
thenecho echo "Account, $USER_ACCOUNT, not found."echo "Leaving the script..."echoexit
fi
#
echo
echo "I found this record:"
echo $USER_ACCOUNT_RECORD
echo
#
LINE1="Is this the correct User Account?[y/n]:"
get_answer
#
#
# Call process_answer function:
#	if user answers anything but "yes", exit script
#
EXIT_LINE1="Because the account, $USER_ACCOUNT, is not "
EXIT_LINE2="the one you wish to delete, we are leaving the script..."
process_anser
#
##############################################################
#
# Search for any running processes that belong to the User Account
#
echo
echo "Step #2 - Find process on system belonging to user account"
echo
echo "$USER_ACCOUNT has the following processes running: "
echo
#
ps -u $USER_ACCOUNT      #List the processes running
#
case $? in
1)			# No processes running for this User Account#echo "There are no processes for this account currently running."echo
;;
0)	# Processes running for this User Account.# Ask Script User if wants us to kill the processes.#unset ANSWER			# I think this line is not neededLINE1="Would you like me to kill the process(es)? [y/n]:"get_answer#case $ANSWER iny|Y|YES|yes|Yes|yEs|yeS|YEs|yES)    # if user answer "yes",#kill User Account processes#echo ## Clean-up temp file upon signals#trap "rm $USER_ACCOUNT_Running_Process.rpt" SIGTERM SIGINT SIGQUIT## List user processes runningps -u $USER_ACCOUNT > $USER_ACCOUNT_Running_Process.rpt#exec < $USER_ACCOUNT_Running_Process.rpt		# Make report Std Input#read USER_PROCESS_REC				# First record will be blankread USER_PROCESS_REC#while [ $? -eq 0 ]do# obtain PIDUSER_PID=$(echo $USER_PROCESS_REC | cut -d " " -f1 )kill -9 $USER_PIDecho "Killed process $USER_PID"read USER_PROCESS_RECdone#echo#rm $USER_ACCOUNT_Running_Process.rpt			# Remove temp report;;*) # If user answers anything but "yes", do not kill.echoecho "Will not kill the process(es)."echo;;esac
;;
esac
###################################################################################
#
# Create a report of all files owned by User Account
#
echo
echo "Step #3 - Find files on system belonging to user account"
echo
echo "Creating a report of all files owned by $USER_ACCOUNT."
echo
echo "It is recommended that you backup/archive these files."
echo "and then do one of two things:"
echo " 1) Delete the files"
echo " 2) Change the files' ownership to a current user account."
echo
echo "Please wait. This may take a while..."
#
REPORT_DATE=`date +%y%m%d`
REPORT_FILE=$USER_ACCOUNT"_Files_"$REPORT_DATE".rpt"
#
find / -user $USER_ACCOUNT > $REPORT_FILE 2>/dev/null
#
echo
echo "Report is complete."
echo "Name of report:	$REPORT_FILE"
echo "Location of report:     `pwd`"
echo
################################################################
#
# Remove User Account
echo
echo "Step #4 - Remove user account"
echo
#
LINE1="Do you wish to remove $USER_ACCOUNT's account from system? [y/n]:"
get_answer
#
# Cass process_answer function:
#	if user answers anything but "yes", exit script
#
EXIT_LINE1="Since you do not wish to remove the user account."
EXIT_LINE2="$USER_ACCOUNT at this time, exiting the script..."
process_answer
#
userdel $USER_ACCOUNT			# delete user account
echo
echo "User account, $USER_ACCOUNT, has been removed"
echo
#

当服务器线程数超过 2500 时自动 dump 线程数最高的 java 进程的内存及线程栈.sh

#!/usr/bin/env bash
# 来源: https://blog.csdn.net/qianghaohao/article/details/80379118 
# 服务器线程数达到 2500 以上时 dump 线程数最多的 java 进程的线程及内存
#
source ~/.bashrc
cur_thread_num=`ps -efL | wc -l`
if [ $cur_thread_num -le 2500 ]; thenexit 0
ficur_date=`date +"%Y-%m-%d_%H-%M-%S"`
cd ./dumpfile
# 服务器当前线程 dump 到文件:按照线程数由大到小排序显示
ps -efL --sort -nlwp > server_thread_dump_$cur_date
# dump 线程数最多的 jvm 的线程及内存
most_thread_num_pid=`cat server_thread_dump_$cur_date | sed -n '2p' | awk '{print $2}'`
nohup jstack -l $most_thread_num_pid > java_app_thread_dump_${cur_date}_pid_${most_thread_num_pid} &
nohup jmap -dump:format=b,file=java_app_mem_dump_${cur_date}_pid_${most_thread_num_pid} $most_thread_num_pid &exit 0

查看磁盘目录使用情况.sh

#!/bin/bash
#
# Big_Users - find big disk space users in various directories
#############################################################
#Parameters for script
#
CHECK_DIRECTORIES="/var/log /home" #directories to check
#
######################### Main Script #######################
#
DATE=$(date '+%m%d%y')             #Date for report file
#
exec > disk_space_$DATE.rpt         #Make report file Std Output
#
echo "Top Ten Disk Space Usage"     #Report header for while report
echo "for $CHECK_DIRECTORIES Directories"
#
for DIR_CHECK in $CHECK_DIRECTORIES       #loop to du directories
doecho ""echo "The $DIR_CHECK Directory:"	#Title header for each directory
#
#	Creating a listing of top ten disk space usersdu -S $DIR_CHECK 2>/dev/null |sort -rn |sed '{11,$D; =}' |sed 'N; s/\n/ /' | gawk '{printf $1 ":" "\t" $2 "\t" $3 "\n"}'
#
done								#End of for loop for du directories
#