shell腳本elseif

A. 闂涓涓猻hell鑴氭湰闂棰橈紝鍏充簬鏉′歡嫻嬭瘯

If hao
....
Elif buhao
...
Else
...
Fi
鎵嬫満鐮侊紝澶ф傛剰鎬濅綘鎳傦紝鍙浠ョ敤elif 濡傛灉娌℃湁灝辨槸elseif

B. shell的awk中用if..else，怎麼多條件嵌套

else和if之間要有個空格

C. shell腳本if then else的問題

問題出在echo("true")或者echo("false")這一句，ftp裡面不支持，你手動執行一下就知道了。

ftp>echo("true")
?Invalidcommand
ftp>help
Commandsmaybeabbreviated.Commandsare:

!	debug	mdir	sendport	site
$	dir	mget	put	size
account	disconnect	mkdir	pwd	status
append	exit	mls	quit	struct
ascii	form	mode	quote	system
bell	get	modtime	recv	sunique
binary	glob	mput	reget	tenex
bye	hash	newer	rstatus	tick
case	help	nmap	rhelp	trace
cd	idle	nlist	rename	type
cp	image	ntrans	reset	user
chmod	lcd	open	restart	umask
close	ls	prompt	rmdir	verbose
cr	macdef	passive	runique	?
delete	mdelete	proxy	send

D. shell 腳本中後台調用函數結束

比面shell腳本文件：#===========test.sh! /bin/shecho_line(){ echo date echo "Wellcome to shell func!"}echo_hello(){ echo "Hello World!"}#======================shell調用兩函數啊我用【./test.sh echo_hello】卻沒輸我已經給test.sh加執行許可權
請問envsetup.sh邊
function gettop()
{
local TOPFILE=build/core/envsetup.mk
if [ -n "$TOP" -a -f "$TOP/$TOPFILE" ] ; then
echo $TOP
else
if [ -f $TOPFILE ] ; then
# The following circumlocution (repeated below as well) ensures
# that we record the true directory name and not one that is
# faked up with symlink names.
PWD= /bin/pwd
fi
}並沒返值
調用何獲取參數 T=$(gettop)
實際參數謝謝

E. shell腳本， if語句必須要有else嗎

不必須，可以直接
if 【條件】
【要做的內容】
fi;
這樣就可以了。也可以用else
if 【條件1】
【要做的內容1】
else if 【條件2】
【要做的內容2】
fi;

F. 鍦↙inux緋葷粺涓嬶紝緙栧啓涓涓猄hell鑴氭湰錛屼粠閿鐩樿誨叆5涓鏁存暟錛岀劧鍚庢樉紺烘渶澶ф暟銆佹渶灝忔暟銆佸拰騫沖潎鏁般

#!/bin/bash

#浠繪剰杈撳叆5涓鏁幫紝鍒ゆ柇鏈澶у礆紝鏈灝忓礆紝鎬誨拰

s=0

read -p "please input:" num

s=$(($s+$num))

max=$num

min=$num

avg=$(($s/5))

for i in `seq 4`

do

read -p "please input:" num
s=$(($s+$num))

if [ $num -le $min ];then
min=$num
fi

if [ $num -ge $max ];then
max=$num
fi

done

echo max:$max min:$min avg:$avg

鎵╁睍璧勬枡錛

for寰鐜錛

涓鑸鏍煎紡涓猴細

for var in item1 item2 ... itemN

do

command1

command2

...

commandN

done

鍐欐垚涓琛岋細

for var in item1 item2 ... itemN; do command1; command2鈥 done;