Linux操作系统异常报错问题与实践解决方法

#!/bin/bash
echo "系统版本:$(cat /etc/redhat-release)" 
echo "内核信息:$(uname -a)"
echo "SeLinux values 设置情况:$(getenforce)"

echo -e "用户信息:\n$(getent passwd)"
echo -e "密码信息:\n$(getent shadow)"

echo -e "网络信息:\n$(ip addr show)"

echo "CPU信息:$(cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c)"
echo "物理CPU数:$(cat /proc/cpuinfo |grep 'physical id'|sort |uniq|wc -l)"
echo "逻辑CPU数:$(cat /proc/cpuinfo |grep "processor"|wc -l)"
echo "CPU核心数:$(cat cat /proc/cpuinfo |grep "cores"|uniq)"
echo "CPU综合信息:\n$(lscpu)"

echo -e "磁盘UUID信息:\n$(blkid)"
echo -e "磁盘信息:\n$(fdisk -l | egrep '/dev|Disk')"
echo -e "磁盘分区信息:\n$(lsblk)"
echo -e "磁盘空间信息:\n$(df -h)"

echo -e "挂载信息:\n$(mount -l)"
echo -e "挂载配置文件:\n$(cat /etc/fstab | egrep -v '#|^$')"

#!/bin/bash

# Simple print cpu topology
# Author: kodango

function get_nr_processor()
{
    grep '^processor' /proc/cpuinfo | wc -l
}

function get_nr_socket()
{
    grep 'physical id' /proc/cpuinfo | awk -F: '{
            print $2 | "sort -un"}' | wc -l
}

function get_nr_siblings()
{
    grep 'siblings' /proc/cpuinfo | awk -F: '{
            print $2 | "sort -un"}'
}

function get_nr_cores_of_socket()
{
    grep 'cpu cores' /proc/cpuinfo | awk -F: '{
            print $2 | "sort -un"}'
}

echo '===== CPU Topology Table ====='
echo

echo '+--------------+---------+-----------+'
echo '| Processor ID | Core ID | Socket ID |'
echo '+--------------+---------+-----------+'

while read line; do
    if [ -z "$line" ]; then
        printf '| %-12s | %-7s | %-9s |\n' $p_id $c_id $s_id
        echo '+--------------+---------+-----------+'
        continue
    fi

    if echo "$line" | grep -q "^processor"; then
        p_id=`echo "$line" | awk -F: '{print $2}' | tr -d ' '`
    fi

    if echo "$line" | grep -q "^core id"; then
        c_id=`echo "$line" | awk -F: '{print $2}' | tr -d ' '`
    fi

    if echo "$line" | grep -q "^physical id"; then
        s_id=`echo "$line" | awk -F: '{print $2}' | tr -d ' '`
    fi
done < /proc/cpuinfo

echo

awk -F: '{
    if ($1 ~ /processor/) {
        gsub(/ /,"",$2);
        p_id=$2;
    } else if ($1 ~ /physical id/){
        gsub(/ /,"",$2);
        s_id=$2;
        arr[s_id]=arr[s_id] " " p_id
    }
}

END{
    for (i in arr)
        printf "Socket %s:%s\n", i, arr[i];
}' /proc/cpuinfo

echo
echo '===== CPU Info Summary ====='
echo

nr_processor=`get_nr_processor`
echo "Logical processors: $nr_processor"

nr_socket=`get_nr_socket`
echo "Physical socket: $nr_socket"

nr_siblings=`get_nr_siblings`
echo "Siblings in one socket: $nr_siblings"

nr_cores=`get_nr_cores_of_socket`
echo "Cores in one socket: $nr_cores"

let nr_cores*=nr_socket
echo "Cores in total: $nr_cores"

if [ "$nr_cores" = "$nr_processor" ]; then
    echo "Hyper-Threading: off"
else
    echo "Hyper-Threading: on"
fi

echo
echo '===== END ====='

#1.定位高负载进程 pid 通过观察load average，以及负载评判标准确认服务器是否存在负载较高的情况；
$top -n 1
#2.找到相关负载进程的子线程PID
$top -Hp [PID]
#3.将线程PID转换为 16进制，为后面查找 jstack 日志做准备
printf "0x%x" [PID]  #比如0x431
#4.jstack日志异常查询
jstack 1040|vim +/0x431 -
#5.定位具体的异常业务使用 pwdx 命令根据 pid 找到业务进程路径
pwdx [PID]

fsck -yf /dev/mappeer/slave3–vg-root
ctrl+d