1、编写脚本/root/bin/systeminfo.sh,显示当前主机系统信息，包括主机名，IPv4地址，操作系统版本，内核版本，CPU型号，内存大小，硬盘大小。
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[root@centos6 scripts]
# cat systeminfo.sh
#!/bin/bash
HostName=`
uname
-n`
Ipv4=`
ifconfig
|
sed
-nr
'2s#.*addr:(.*) Bca.*$#\1#gp'
`
Cpu=`lscpu|
sed
-n
'13p'
|
tr
-s
' '
`
Mem=`
free
-hm |
grep
"Mem"
|
tr
-s
' '
':'
|
cut
-d: -f2`
Disk=`
fdisk
-l |
grep
'/dev/sda:'
|
sed
-r
's#.*: (.*),.*$#\1#g'
`
echo
the
hostname
is: $HostName
echo
the server_ip is: $Ipv4
echo
the opeartion system is: $(
cat
/etc/redhat-release
)
echo
the kernel verison is: $(
uname
-r)
echo
the cpuinfo is: $Cpu
echo
the memery size is: $Mem
echo
the Hardisk size is: $Disk
[root@centos6 scripts]
# sh systeminfo.sh
the
hostname
is: centos6.localdomain
the server_ip is: 10.1.249.94
the opeartion system is: CentOS release 6.8 (Final)
the kernel verison is: 2.6.32-642.el6.x86_64
the cpuinfo is: Model name: AMD A8-4500M APU with Radeon(tm) HD Graphics
the memery size is: 980M
the Hardisk size is: 128.8 GB
[root@centos6 scripts]
#
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2、编写脚本/root/bin/backup.sh，可实现每日将/etc/目录备份到/root/etcYYYY-mm-dd中
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[root@centos6 scripts]
# cat backup.sh
#!/bin/bash
backup_dir=
"/tmp/etc-$(date +%F)"
cp
-aR
/etc/
$backup_dir &&
echo
"the $backup_dir is backup successfull"
[root@centos6 scripts]
# sh backup.sh
the
/tmp/etc-2016-08-11
is backup successfull
[root@centos6 scripts]
# ll /tmp/
总用量 40
drwxr-xr-x. 122 root root 12288 8月 11 19:03 etc-2016-08-11
[root@centos6 scripts]
#
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3、编写脚本/root/bin/disk.sh,显示当前硬盘分区中空间利用率最大的值
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[root@centos6 scripts]
# cat disk.sh
#!/bin/bash
MaxUse=`
df
|
grep
"/dev/sda"
|
sed
-r
's#.* ([0-9]+%).*#\1#g'
|
sort
-nr|
head
-1`
echo
"当前硬盘分区中空间利用率最大的值为:$MaxUse"
[root@centos6 scripts]
# sh disk.sh
当前硬盘分区中空间利用率最大的值为:22%
[root@centos6 scripts]
#
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4、编写脚本/root/bin/links.sh,显示正连接本主机的每个远程主机的IPv4地址和连接数，并按连接数从大到小排序
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[root@centos6 scripts]
# cat links.sh
#!/bin/bash
Links=`
netstat
-tn |
grep
tcp |
tr
-s
' '
':'
|
cut
-d: -f6|
sort
-nr|
uniq
-c`
echo
-e
"主机的每个远程主机的IPv4连接数和地址为:$Links"
[root@centos6 scripts]
# sh links.sh
主机的每个远程主机的IPv4连接数和地址为: 2 10.1.250.79
[root@centos6 scripts]
#
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5、写一个脚本/root/bin/sumid.sh，计算/etc/passwd文件中的第10个用户和第20用户的ID之和
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[root@centos6 scripts]
# cat sumid.sh
#!/bin/bash
uuid1=`
cat
/etc/passwd
|
sed
-n
'10p'
|
cut
-d: -f3`
uuid2=`
cat
/etc/passwd
|
sed
-n
'20p'
|
cut
-d: -f3`
sum
=$(($uuid1+$uuid2))
echo
"第10个用户和第20用户的ID之和为:$sum"
[root@centos6 scripts]
# sh sumid.sh
第10个用户和第20用户的ID之和为:180
[root@centos6 scripts]
#
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6、写一个脚本/root/bin/sumspace.sh，传递两个文件路径作为参数给脚本，计算这两个文件中所有空白行之和
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[root@centos6 scripts]
# cat sumspace.sh
#!/bin/bash
[ $
# -lt 2 ] && echo "please input two path:" && exit 1
Args1=`
grep
"^$"
$1 |
wc
-l`
Args2=`
grep
"^$"
$2 |
wc
-l`
let
sumspace=$Args1+$Args2
echo
"这两个文件中所有空白行之和为:$sumspace"
[root@centos6 scripts]
# sh sumspace.sh /etc/issue /etc/issue
这两个文件中所有空白行之和为:2
[root@centos6 scripts]
# sh sumspace.sh
please input two path:
[root@centos6 scripts]
#
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6、写一个脚本/root/bin/sumfile.sh,统计/etc, /var, /usr目录中共有多少个一级子目录和文件
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[root@centos6 scripts]
# sh sumfile.sh
please input at least three
dir
:
[root@centos6 scripts]
# sh sumfile.sh /etc /var /usr
/etc
,
/var
,
/usr
共有一级子目录和文件292个
[root@centos6 scripts]
# cat sumfile.sh
#!/bin/bash
[ $
# -lt 3 ] && echo "please input at least three dir:" && exit 1
total1=`
ls
-A $1 |
wc
-l`
total2=`
ls
-A $2 |
wc
-l`
total3=`
ls
-A $3 |
wc
-l`
sumfile=$(($total1+$total2+$total3))
echo
"$1,$2,$3共有一级子目录和文件$sumfile个"
[root@centos6 scripts]
#
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7、写一个脚本/root/bin/argsnum.sh，接受一个文件路径作为参数；如果参数个数小于1，则提示用户“至少应该给一个参数”，并立即退出；如果参数个数不小于1，则显示第一个参数所指向的文件中的空白行数
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[root@centos6 scripts]
# sh argsum.sh
at least input one args:
[root@centos6 scripts]
# sh argsum.sh /etc/issue
the args you input has 1 lines space
[root@centos6 scripts]
# cat argsum.sh
#!/bin/bash
[ $
# -lt 1 ] && echo "at least input one args:" && exit 1 || echo "the args you input has `grep "^$" $1|wc -l` lines space"
[root@centos6 scripts]
#
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8、写一个脚本/root/bin/hostping.sh，接受一个主机的IPv4地址做为参数，测试是否可连通。如果能ping通，则提示用户“该IP地址可访问”；如果不可ping通，则提示用户“该IP地址不可访问”
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[root@centos6 scripts]
# sh hostping.sh
please input one ip address:
[root@centos6 scripts]
# sh hostping.sh 10.1.249.94
you can access the website!
[root@centos6 scripts]
# sh hostping.sh 10.1.249.93
the ip is not unreachable
[root@centos6 scripts]
# cat hostping.sh
#!/bin/bash
[ $
# -lt 1 ] && echo "please input one ip address:" && exit 1
ping
-c1 -W1 $1 &>
/dev/null
&&
echo
"you can access the website!"
||
echo
"the ip is not unreachable"
[root@centos6 scripts]
#
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本文转自chengong1013 51CTO博客，原文链接：http://blog.51cto.com/purify/1837417，如需转载请自行联系原作者
