脚本检查 CentOS 系统信息

脚本信息

#!/bin/bash
# auth:lsr_zds
# func:sys info check
# version:v1.0
# sys:centos6.x/7.x

[ $(id -u) -gt 0 ] && echo "请用root用户执行此脚本！" && exit 1
sysversion=$(rpm -q centos-release | cut -d- -f3)
line="-------------------------------------------------"


[ -d logs ] || mkdir logs

# 记录输出位置
sys_check_file="logs/$(ip a show dev eth0 | grep -w inet | awk '{print $2}' | awk -F '/' '{print $1}')-`date +%Y%m%d`.txt"

# 获取系统cpu信息
function get_cpu_info() {
    Physical_CPUs=$(grep "physical id" /proc/cpuinfo | sort | uniq | wc -l)
    Virt_CPUs=$(grep "processor" /proc/cpuinfo | wc -l)
    CPU_Kernels=$(grep "cores" /proc/cpuinfo | uniq | awk -F ': ' '{print $2}')
    CPU_Type=$(grep "model name" /proc/cpuinfo | awk -F ': ' '{print $2}' | sort | uniq)
    CPU_Arch=$(uname -m)
cat <<EOF | column -t 
CPU信息:

物理CPU个数: $Physical_CPUs
逻辑CPU个数: $Virt_CPUs
每CPU核心数: $CPU_Kernels
CPU型号: $CPU_Type
CPU架构: $CPU_Arch
EOF
}

# 获取系统内存信息
function get_mem_info() {
    check_mem=$(free -m)
    # KB
    MemTotal=$(grep MemTotal /proc/meminfo | awk '{print $2}')  
    # KB
    MemFree=$(grep MemFree /proc/meminfo | awk '{print $2}')    
    let MemUsed=MemTotal-MemFree
    MemPercent=$(awk "BEGIN {if($MemTotal==0){printf 100}else{printf \"%.2f\",$MemUsed*100/$MemTotal}}")
    # 内存总容量(MB)
    report_MemTotal="$((MemTotal/1024))""MB"        
    # 内存剩余(MB)
    report_MemFree="$((MemFree/1024))""MB"          
    report_MemUsedPercent="$(awk "BEGIN {if($MemTotal==0){printf 100}else{printf \"%.2f\",$MemUsed*100/$MemTotal}}")""%"   #内存使用率%

cat <<EOF
内存信息：

${check_mem}
EOF
}

# 获取系统网络信息
function get_net_info() {
    pri_ipadd=$(ip a show dev eth0 | grep -w inet | awk '{print $2}' | awk -F '/' '{print $1}')
    pub_ipadd=$(curl ifconfig.me -s)
    gateway=$(ip route | grep default | awk '{print $3}')
    mac_info=$(ip link | egrep -v "lo" | grep link | awk '{print $2}')
    dns_config=$(egrep -v "^$|^#" /etc/resolv.conf)
    route_info=$(route -n)
cat <<EOF | column -t 
IP信息:

系统公网地址: ${pub_ipadd}
系统私网地址: ${pri_ipadd}
网关地址: ${gateway}
MAC地址: ${mac_info}

路由信息:
${route_info}

DNS 信息:
${dns_config}
EOF
}

# 获取系统磁盘信息
function get_disk_info() {
    disk_info=$(fdisk -l | grep "Disk /dev" | cut -d, -f1)
    disk_use=$(df -hTP | awk '$2!="tmpfs"{print}')
    disk_inode=$(df -hiP | awk '$1!="tmpfs"{print}')

cat <<EOF
磁盘信息:

${disk_info}
${line}
磁盘使用:

${disk_use}
${line}
inode信息:

${disk_inode}
EOF


}

# 获取系统信息
function get_systatus_info() {
    sys_os=$(uname -o)
    sys_release=$(cat /etc/redhat-release)
    sys_kernel=$(uname -r)
    sys_hostname=$(hostname)
    sys_selinux=$(getenforce)
    sys_lang=$(echo $LANG)
    sys_lastreboot=$(who -b | awk '{print $3,$4}')
    sys_runtime=$(uptime | awk '{print  $3,$4}' | cut -d, -f1)
    sys_time=$(date)
    sys_load=$(uptime | cut -d: -f5)

cat <<EOF | column -t 
系统信息:

系统: ${sys_os}
发行版本:   ${sys_release}
系统内核:   ${sys_kernel}
主机名:    ${sys_hostname}
selinux状态:  ${sys_selinux}
系统语言:   ${sys_lang}
系统当前时间: ${sys_time}
系统最后重启时间:   ${sys_lastreboot}
系统运行时间: ${sys_runtime}
系统负载:   ${sys_load}
EOF
}

# 获取服务信息
function get_service_info() {
    port_listen=$(netstat -lntup | grep -v "Active Internet")
    kernel_config=$(sysctl -p 2>/dev/null)
    if [ ${sysversion} -gt 6 ];then
        service_config=$(systemctl list-unit-files --type=service --state=enabled | grep "enabled")
        run_service=$(systemctl list-units --type=service --state=running | grep ".service")
    else
        service_config=$(/sbin/chkconfig | grep -E ":on|:启用" | column -t)
        run_service=$(/sbin/service --status-all | grep -E "running")
    fi
cat <<EOF
服务启动配置:

${service_config}
${line}
运行的服务:

${run_service}
${line}
监听端口:

${port_listen}
${line}
内核参考配置:

${kernel_config}
EOF
}

# 获取 sys && user 信息
function get_sys_user() {
    login_user=$(awk -F: '{if ($NF=="/bin/bash") print $0}' /etc/passwd)
    ssh_config=$(egrep -v "^#|^$" /etc/ssh/sshd_config)
    sudo_config=$(egrep -v "^#|^$" /etc/sudoers | grep -v "^Defaults")
    host_config=$(egrep -v "^#|^$" /etc/hosts)
    crond_config=$(for cronuser in /var/spool/cron/*; do ls ${cronuser} 2>/dev/null | cut -d/ -f5; egrep -v "^$|^#" ${cronuser} 2>/dev/null; echo "" ;done)
cat <<EOF
系统登录用户:

${login_user}
${line}
ssh 配置信息:

${ssh_config}
${line}
sudo 配置用户:

${sudo_config}
${line}
定时任务配置:

${crond_config}
${line}
hosts 信息:

${host_config}
EOF
}

# 获取进程信息
function process_top_info() {

    top_title=$(top -b -n1 | head -n7 | tail -n1)
    cpu_top10=$(top -b -n1 | head -n17 | tail -n10)
    mem_top10=$(top -b -n1 | head -n17 | tail -n10 | sort -k10 -r)

cat <<EOF
CPU占用top10:

${top_title}
${cpu_top10}

内存占用top10:

${top_title}
${mem_top10}
EOF
}

function sys_check() {
    get_cpu_info
    echo ${line}
    get_mem_info
    echo ${line}
    get_net_info
    echo ${line}
    get_disk_info
    echo ${line}
    get_systatus_info
    echo ${line}
    get_service_info
    echo ${line}
    get_sys_user
    echo ${line}
    process_top_info
}


sys_check > ${sys_check_file}

执行结果

[root@demo ~]# cat logs/10.10.200.108-20200923.txt 
CPU信息:
物理CPU个数:  1
逻辑CPU个数:  2
每CPU核心数:  1
CPU型号:      Intel(R)  Core(TM)  i5-8250U  CPU  @  1.60GHz
CPU架构:      x86_64
-------------------------------------------------
内存信息：

              total        used        free      shared  buff/cache   available
Mem:           3790        3062         291           8         435         463
Swap:          8191           0        8191
-------------------------------------------------
IP信息:
系统公网地址:  182.50.120.71
系统私网地址:  10.10.200.108
网关地址:      10.10.200.1
MAC地址:       00:15:5d:88:6a:00
路由信息:
Kernel         IP                 routing        table
Destination    Gateway            Genmask        Flags  Metric  Ref  Use  Iface
0.0.0.0        10.10.200.1        0.0.0.0        UG     100     0    0    eth0
10.10.200.0    0.0.0.0            255.255.255.0  U      100     0    0    eth0
DNS            信息:
nameserver     202.96.199.133
-------------------------------------------------
磁盘信息:

Disk /dev/sda: 32.2 GB
Disk /dev/mapper/centos-root: 23.4 GB
Disk /dev/mapper/centos-swap: 8589 MB
-------------------------------------------------
磁盘使用:

Filesystem              Type      Size  Used Avail Use% Mounted on
/dev/mapper/centos-root xfs        22G  1.7G   21G   8% /
devtmpfs                devtmpfs  1.9G     0  1.9G   0% /dev
/dev/sda2               xfs       194M  150M   44M  78% /boot
-------------------------------------------------
inode信息:

Filesystem              Inodes IUsed IFree IUse% Mounted on
/dev/mapper/centos-root    11M   59K   11M    1% /
devtmpfs                  471K   358  471K    1% /dev
/dev/sda2                  89K   333   89K    1% /boot
-------------------------------------------------
系统信息:
系统:              GNU/Linux
发行版本:          CentOS                 Linux  release  7.5.1804  (Core)
系统内核:          3.10.0-862.el7.x86_64
主机名:            demo
selinux状态:       Enforcing
系统语言:          en_US.UTF-8
系统当前时间:      Wed                    Sep    23       17:22:47  CST     2020
系统最后重启时间:  2020-09-16             22:51
系统运行时间:      1                      day
系统负载:          0.00,                  0.01,  0.05
-------------------------------------------------
服务启动配置:

auditd.service                              enabled
autovt@.service                             enabled
crond.service                               enabled
dbus-org.fedoraproject.FirewallD1.service   enabled
dbus-org.freedesktop.NetworkManager.service enabled
dbus-org.freedesktop.nm-dispatcher.service  enabled
firewalld.service                           enabled
getty@.service                              enabled
irqbalance.service                          enabled
kdump.service                               enabled
lvm2-monitor.service                        enabled
microcode.service                           enabled
NetworkManager-dispatcher.service           enabled
NetworkManager-wait-online.service          enabled
NetworkManager.service                      enabled
postfix.service                             enabled
rhel-autorelabel.service                    enabled
rhel-configure.service                      enabled
rhel-dmesg.service                          enabled
rhel-domainname.service                     enabled
rhel-import-state.service                   enabled
rhel-loadmodules.service                    enabled
rhel-readonly.service                       enabled
rsyslog.service                             enabled
sshd.service                                enabled
sysstat.service                             enabled
systemd-readahead-collect.service           enabled
systemd-readahead-drop.service              enabled
systemd-readahead-replay.service            enabled
tuned.service                               enabled
-------------------------------------------------
运行的服务:

auditd.service           loaded active running Security Auditing Service
crond.service            loaded active running Command Scheduler
dbus.service             loaded active running D-Bus System Message Bus
firewalld.service        loaded active running firewalld - dynamic firewall daemon
getty@tty1.service       loaded active running Getty on tty1
hypervkvpd.service       loaded active running Hyper-V KVP daemon
hypervvssd.service       loaded active running Hyper-V VSS daemon
irqbalance.service       loaded active running irqbalance daemon
lvm2-lvmetad.service     loaded active running LVM2 metadata daemon
NetworkManager.service   loaded active running Network Manager
polkit.service           loaded active running Authorization Manager
postfix.service          loaded active running Postfix Mail Transport Agent
rsyslog.service          loaded active running System Logging Service
sshd.service             loaded active running OpenSSH server daemon
systemd-journald.service loaded active running Journal Service
systemd-logind.service   loaded active running Login Service
systemd-udevd.service    loaded active running udev Kernel Device Manager
tuned.service            loaded active running Dynamic System Tuning Daemon
-------------------------------------------------
监听端口:

Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      955/sshd            
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      1273/master         
tcp6       0      0 :::22                   :::*                    LISTEN      955/sshd            
tcp6       0      0 ::1:25                  :::*                    LISTEN      1273/master         
-------------------------------------------------
内核参考配置:


-------------------------------------------------
系统登录用户:

root:x:0:0:root:/root:/bin/bash
-------------------------------------------------
ssh 配置信息:

HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_ecdsa_key
HostKey /etc/ssh/ssh_host_ed25519_key
SyslogFacility AUTHPRIV
AuthorizedKeysFile	.ssh/authorized_keys
PasswordAuthentication yes
ChallengeResponseAuthentication no
GSSAPIAuthentication yes
GSSAPICleanupCredentials no
UsePAM yes
X11Forwarding yes
AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES
AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT
AcceptEnv LC_IDENTIFICATION LC_ALL LANGUAGE
AcceptEnv XMODIFIERS
Subsystem	sftp	/usr/libexec/openssh/sftp-server
-------------------------------------------------
sudo 配置用户:

root	ALL=(ALL) 	ALL
%wheel	ALL=(ALL)	ALL
-------------------------------------------------
定时任务配置:


-------------------------------------------------
hosts 信息:

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
-------------------------------------------------
CPU占用top10:

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
    1 root      20   0   46108   6404   3944 S   0.0  0.2   0:05.15 systemd
    2 root      20   0       0      0      0 S   0.0  0.0   0:00.06 kthreadd
    3 root      20   0       0      0      0 S   0.0  0.0   0:00.46 ksoftirqd/0
    5 root       0 -20       0      0      0 S   0.0  0.0   0:00.00 kworker/0:0H
    6 root      20   0       0      0      0 S   0.0  0.0   1:45.76 kworker/u4:0
    7 root      rt   0       0      0      0 S   0.0  0.0   0:01.43 migration/0
    8 root      20   0       0      0      0 S   0.0  0.0   0:00.00 rcu_bh
    9 root      20   0       0      0      0 S   0.0  0.0   0:13.61 rcu_sched
   10 root       0 -20       0      0      0 S   0.0  0.0   0:00.00 lru-add-drain
   11 root      rt   0       0      0      0 S   0.0  0.0   0:00.61 watchdog/0

内存占用top10:

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
    1 root      20   0   46108   6404   3944 S   0.0  0.2   0:05.15 systemd
    6 root      20   0       0      0      0 S   0.0  0.0   1:45.76 kworker/u4:0
    9 root      20   0       0      0      0 S   0.0  0.0   0:13.61 rcu_sched
    7 root      rt   0       0      0      0 S   0.0  0.0   0:01.43 migration/0
   11 root      rt   0       0      0      0 S   0.0  0.0   0:00.61 watchdog/0
    3 root      20   0       0      0      0 S   0.0  0.0   0:00.46 ksoftirqd/0
    2 root      20   0       0      0      0 S   0.0  0.0   0:00.06 kthreadd
    8 root      20   0       0      0      0 S   0.0  0.0   0:00.00 rcu_bh
   10 root       0 -20       0      0      0 S   0.0  0.0   0:00.00 lru-add-drain
    5 root       0 -20       0      0      0 S   0.0  0.0   0:00.00 kworker/0:0H