网站内容设计,做响应式网站的物流,服装行业网站建设比较好,招生处网站建设方案以下脚本已经是在ubuntu下测试的 demo持续更新中。。。 1、for 循环测试#xff0c;#xff0c;#xff0c;Ping 局域网
#!/bin/bashi1
for i in {1..254}
do# 每隔0.3s Ping 一次#xff0c;每次超时时间3s#xff0c;Ping的结果直接废弃ping-w 3 -i 0.3 192.168.110.$i… 以下脚本已经是在ubuntu下测试的 demo持续更新中。。。 1、for 循环测试Ping 局域网
#!/bin/bashi1
for i in {1..254}
do# 每隔0.3s Ping 一次每次超时时间3sPing的结果直接废弃ping-w 3 -i 0.3 192.168.110.$i /dev/nullif [ $? -eq 0 ];thenecho 192.168.120.$i is rechableelseecho 192.168.120.$i is unrechablefi#let i
done2、批量添加用户
#!/bin/bashuser$(cat /opt/user.txt)for i in $user
doecho $iuseradd $iecho $i:$i | chpasswd#echo 1234 | passwd --stdin $i
done注意点
ubuntu 不支持--stdin要用echo 和 chpasswd结合使用在ubuntu 上要使用$(cat /opt/user.txt)而不是$cat /opt/user.txt, 否则通过for 循环遍历时第一个数据老是给加上$比如user.txt第一行的数据是user1,它会变成$user1,
有批量添加就有批量删除
#!/bin/bashuser$(cat /opt/user.txt)for i in $user
douserdel -f $i
done
3、将1-100中的奇数放入数组
#!/bin/bashfor((i0;i100;i))
doif [ $[i%2] -eq 1 ];thenarray[$[$[$i-1]/2]]$ifi
done
#echo ${array[0]}
echo ${array[*]}运行结果
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99知识点
$[] 是用来进行数学运算的支持、-、*、%、/。效果同$(())$[] 中括号里引用的变量可以不用加$符号比如上面的 $[i%2]$[i%2]等同于$((i%2))array[*] 表示获取数组中的所有数据 4、创建任意数字及长度的数组自定义元素
#!/bin/bashi0while true
doread -p input? yes or no: operateif [ $operate no ];thenbreakfiread -p input the value valuearray[$i]$valuelet i
doneecho ${array[*]}
知识点
[ $doing no ] 等价于[ $doing no ] , 是判断字符串的对于纯字符串所以加不加引号都可
5、将数组中的数小于60的变成60高于60的不操作
#!/bin/basharray(61 62 63 50 59 64)
count${#array[*]}echo before:${array[*]}
for((i0;i$count;i))
do
if [ ${array[$i]} -lt 60 ] ; thenarray[$i]60
fi
doneecho after:${array[*]}知识点
数组的定义中的元素之间用空格分开不要用逗号,数组的长度用 ${#array[*]} 或 ${#array[]} 获取数组元素的获取用 ${array[0]} , 赋值的时候不用加$ {}
6、判断数组中最大的数
#!/bin/bashmax0
array(1 2 5 3 7 9)
count${#array[*]}for((i0;i$count;i))
doif [ ${array[$i]} -gt $max ];thenmax${array[$i]}fi
doneecho the max num of array is ${max}知识点 在取变量的时候需要加$比如$max, ${array[0]}再给变量赋值的时候不需要加$比如max1, array[0]1
7、猜数字
#!/bin/bashseed(0 1 2 3 4 5 6 7 8 9)
len${#seed[*]}
random$[RANDOM%$len]
guess${seed[$random]}while :
doread -p 0-9? you guess which one? doingif [ $doing -eq $guess ]; thenecho bingoexit 0elif [ $doing -gt $guess ]; thenecho oops, too bigelse echo oops, too smallfidone
知识点
$RANDOM 的范围是 [0, 32767] 空语句相当于true即 while : 相当于 while true
8、删除数组中小于60的元素unset
#!/bin/bashnum(58 59 60 61 62)i0
for p in ${num[*]}
doif [ $p -lt 60 ]; thenunset num[$i]filet i
doneecho the final result is ${num[*]}
exit 0
知识点
unset 为 shell 内建指令用于删除定义的可读可写的shell变量包括环境变量和shell函数。不能对只读操作。
tt1
echo $tt
unset tt
echo $tt9、求1...100的和
#!/bin/bashsum0
for i in {1..100}
dosum$[$sum$i]
doneecho the result is ${sum}
exit 010、求1...50的和until
#!/bin/bashsum0
i0until [ $i -gt 50 ]
do#sum$[$sum$i]let sum$ilet i
doneecho the result is ${sum}
知识点
let 命令是 BASH 中用于计算的工具用于执行一个或多个表达式变量计算中不需要加上 $ 来表示变量。如果表达式中包含了空格或其他特殊字符则必须引起来。
11、石头,剪刀,布
#!/bin/bashgame(rock paper sissor)
random$[$RANDOM%3]
scriptResult${game[$random]}echo $scriptResultecho choose your result:
echo 1.rock
echo 2.paper
echo 3.sissorread -p choose 1, 2 or 3: choicecase $choice in1)if [ $[$random1] -eq 1 ]; thenecho equalelif [ $[$random1] -eq 2 ]; thenecho you loseelseecho you winfi;;2)if [ $[$random1] -eq 1 ]; thenecho you winelif [ $[$random1] -eq 2 ]; thenecho equalelseecho you losefi;;3)if [ $[$random1] -eq 1 ]; thenecho you loseelif [ $[$random1] -eq 2 ]; thenecho you winelseecho equalfi;;*)echo wrong number;;esacexit 012、成绩计算小于60 不及格 85以上优秀
#!/bin/bashwhile :
doread -p input score: scoreif [ $score -le 100 ] [ $score -gt 85 ]thenecho greatelif [[ $score -lt 85 $score -ge 60 ]]; thenecho normalelseecho failedfi
doneexit 0知识点
[ $score -le 100 ] [ $score -gt 85 ] 等价于 [[ $score -le 100 $score -gt 85 ]] ,双中括号之间不要有空格[[ ]] 是shell中的关键字不是命令单中括号[]是test命令 [[ ]] 不需要注意某些细枝末节比[]功能强大 [[ ]] 支持逻辑运算 [[ ]] 支持正则表达式 [[]] 关键字
13、计算当前的内存使用百分比
#!/bin/bashmem_line$(free -m | grep Mem)
memory_total$(echo $mem_line | awk {print $2})
memory_used$(echo $mem_line | awk {print $3})echo total memory: $memory_total MiB
echo used memory: $memory_used MiB
#echo usage rate: $[$memory_used/$memory_total * 100]%
echo usage rate: $(echo $mem_line | awk {printf(%0.2f%, $3 / $2 * 100)})exit 0 知识点
1、free -m 命令以MiB为单位打印
1 MiB 1024KiB, 1MB1000KiB
man free-m, --mebi Display the amount of memory in mebibytes. total used free shared buff/cache available
Mem: 3876 1182 1518 3 1175 2428
Swap: 923 0 923grep Mem 会将第二行Mem开头的那行抽取出来
2、awk 会进行文本处理, 利用printf函数处理小数
awk {printf(%0.2f%, $3 / $2 * 100)}
14、过滤出本机ether网卡的MAC地址
#!/bin/basheth$(ifconfig | grep ether | awk {print $2})echo $ethexit 0思路也简单通过ifconfig 获取ether所在行通过awk获取对应行的第二个参数$2 ens37: flags4163UP,BROADCAST,RUNNING,MULTICAST mtu 1500 inet6 fe80::5e0a:f1cf:cbf8:4c2d prefixlen 64 scopeid 0x20link ether 00:0c:29:f6:b6:99 txqueuelen 1000 (Ethernet) RX packets 87 bytes 10378 (10.3 KB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 3992 bytes 720667 (720.6 KB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags73UP,LOOPBACK,RUNNING mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10host loop txqueuelen 1000 (Local Loopback) RX packets 68614 bytes 4911600 (4.9 MB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 68614 bytes 4911600 (4.9 MB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 15、 linux 程序设计 第四版 shell 脚本
已调试大致没问题想学习的复制拿去
#!/bin/shmenu_choice
current_cd
title_filetitle.cdb
tracks_filetracks.cdb
temp_file/tmp/cdb.$$
trap rm -f $temp_file EXITget_return() {echo Please return \cread xreturn 0
}get_confirm() {echo -e Are you sure? \cwhile truedoread xcase $x iny | yes|Y|Yes|YES) return 0;;n | no|N|No|NO) echoecho Cancelledreturn 1;;*) echo Please enter yes or no;;esacdone}set_menu_choice() {clearecho Options : -echoecho a) Add new CDecho f) Find CDecho c) Cont the CDs and tracks in the catalogif [ $cdcatnum ! ]; thenecho l) List track on $cdtitleecho r) Remove $cdtitleecho u) Update track information for $cdtitlefiecho q) Quitecho echo Please enter choice then press return \cread menu_choicereturn
}insert_title() {echo $* $title_filereturn
}insert_track() {echo $* $tracks_filereturn
}add_record_tracks() {echo Enter track information for this CDecho When no more tracks enter qcdtrack1cdtitlewhile [ $cdtitle ! q ] doecho Track $cdtrack, track title? \cread tmpcdtitle${tmp%%, *}echo ${tmp}echo ${cdtitle}-------if [ $tmp ! $cdtitle ]; thenecho Sorry, no commas allowedcontinuefiif [ -n $cdtitle ]; thenecho enterecho ${cdtitle}-------if [ ${cdtitle} ! q ]; thenecho enter1insert_track $cdcatnum, $cdtrack, $cdtitlefielsecdtrack$((cdtrack-1))ficdtrack$((cdtrack1))done
}add_records() {echo Enter catalog name \cread tmp;cdcatnum${tmp%%, *}echo Enter title \cread tmpcdtitle${tmp%%, *}echo Enter type \cread tmpcdtype${tmp%%, *}echo Enter artist/composer \cread tmpcdac${tmp%%, *}echo About to add new entryecho $cdcatnum $cdtitle $cdtype $cdacif get_confirm; theninsert_title $cdcatnum, $cdtitle, $cdtype, $cdacadd_record_trackselseremove_recordsfireturn
}find_cd() {if [ $1 n ] ; then asklistnelseasklistyficdcatnuecho -e Enter a string to search for in the CD titles \cread searchstrif [ $searchstr ] ; thenreturn 0figrep $searchstr $title_file $temp_fileset $(wc -l $temp_file)linesfound$1case $linesfound in0) echo Sorry, nothing foundget_returnreturn 0;;1) ;;2) echo Sorry, not uniqueecho Found the followingcat $temp_fileget_returnreturn 0esacIFS,read cdcatnum cdtitle cdtype cdac $temp_fileIFS if [ -z $cdcatnum ]; thenecho Sorry, cound not extract catalog field from $temp_fileget_returnreturn 0fiechoecho Catalog num: $cdcatnumecho Title: $cdtitleecho TYPe: $cdtypeecho Artist: $cdacechoget_returnif [ $asklist y ]; thenecho -e View tracks for this CD? \cif [ $x y ]; thenecholist_tracksechofi fireturn 1
}update_cd() {if [ -z $cdcatnum ]; thenecho You must select a CD firstfind_cd nfiif [ -n $cdcatnum ]; then echo Current tracks are: -list_tracksechoecho This will re_enter the tracks for $cdtitleget_confirm {grep -v ^${cdcatnum}, $tracks_file $temp_filemv $temp_file $tracks_fileechoadd_record_tracks}fireturn
}count_cds() {set $(wc -l $title_file)num_titles$1set $(wc -l $tracks_file)num_tracks$1echo found $num_title CDs, with a total of $num_tracks tracksget_returnreturn
}remove_records() {if [ -z $cdcatnum ]; thenecho You must select a CD firstfind_cd nfiif [ -n $cdcatnum ]; thenecho You are about to delete $cdtitleget_confirm {grep -v ^${cdcatnum}, $title_file $temp_filemv $temp_file $title_filegrep -v ^${cdcatnum}, $tracks_file $temp_filemv $temp_file $tracks_filecdcatnumecho Entry removed}get_returnfireturn
}list_tracks() {if [ $cdcatnum ]; thenecho no CD selected yetreturnelsegrep ^${cdcatnum}, $tracks_file $temp_filenum_tracks$(wc -l $temp_file)if [ $num_tracks 0 ]; thenecho no tracks found for $cdtitleelse {echoecho $cdtitle :-echo cut -f 2- -d, $temp_file} | ${PAGER:-more}fifiget_returnreturn
}rm -f $temp_fileif [ ! -f $title_file ];thentouch $title_file
fiif [ ! -f $title_file ]; thentouch $tracks_file
ficlear
echo
echo
echo Mini CD manager
sleep 1quitn
while [ $quit ! y ];
doset_menu_choicecase $menu_choice ina) add_records;;r) remove_records;;f) find_cd y;;u) update_cd;;c) count_cds;;l) list_tracks;;b) echomore $title_fileechoget_return;; q|Q) quity;;*) echo Sorry, choice not recognized;;esac
donerm -f $temp_file
echo Finished
exit 0
