bash で for文やwhile文を1行で書く

for i in {1..10}; do echo $i; done

while true; do echo 'hello'; done

この記事へのComments:

- : 2015/06/24 (水) 18:24:26

本文が英数字のみの場合は書き込めません。

FILE=$1

Lines=`wc -l < $FILE`
CurrentLine=2
while [ $CurrentLine -lt $Lines ]
do
((CurrentLine++))
LINE=`tail -$CurrentLine $FILE | head -1`
j=0
for i in $LINE
do
((j++))
if [ $j -eq 3 ]
then
echo -n $i" "
fi
done
done
echo

- : 2015/06/24 (水) 18:25:25

コメント投稿確認


#!/bin/bash


if [ $# -ne 1 -o ! -d "$1" -o ! -r "$1" ]; then
echo ERROR
exit 1
fi

NFiles=`ls -l $1 | wc -l`
echo $NFiles

VAR=`ls -l $1 | tr -s " " | cut -d" " -f5`
RET=0
for S in $VAR
do
((RET = $RET + $S))
done

echo $RET

- : 2015/06/24 (水) 18:28:29

※印は必須項目です。


#!/bin/bash

set `cat $1`
TIMES=$1
SEC=$2
OUT=$3
BAK=$4
NUM=$5
ERR=$6

# flag to tell if mail message has been sent
MAILSENT=0

if [ -f $OUT ]
then
#if the maximum number of backups already exists,
#delete the last one to make way for the next run-through
if [ -f $OUT.$BKPNUM ]
then
rm $OUT.$BKPNUM
fi

#rename each existing backup file with the next higher numbered extension
while [ $BAK -ge 1 ]
do
NEXT=`expr $BAK + 1`
mv $OUT.$BAK $OUT.$NEXT 2>$ERR
((BAK--))
done

#rename the already existing output file with an extension of 1
mv $OUT $OUT.1 2>>$ERR
fi

while [ $TIMES -gt 0 ]
do
USERNUM=`who | wc -l` #number of users currently logged in
DATE=`date`
#if number of current users >= the max set in the config file, send email
if [ $USERNUM -ge $NUM -a $MAILSENT -eq 0 ]
then
`echo Number of users exceeded: $USERNUM at $DATE | mail $USER`

echo "Max number of users met. Emailing $USER."
MAILSENT=1 #change the variable so mail is not sent more than once
fi
(echo $DATE Users=$USERNUM) >> $OUT
((TIMES--))
sleep $SEC
done

https://raisaforshaw.wordpress.com : 2017/07/22 (土) 09:21:03

Its like you read my mind! You seem to know a lot about this, like you wrote the book in it or something.

I think that you could do with a few pics to drive the message home a little bit, but instead of
that, this is fantastic blog. A fantastic read.
I'll definitely be back.

管理人のみ通知 :

Trackbacks:


プロフィール

トニヒコ

Author:トニヒコ
趣味は旅行と読書とマンガ。
将来の夢はコスモポリタン!

リンク・フリーです。

My hobby is traveling and reading(include manga).
My dream is to become cosmopolitan!

最新記事
最新コメント
最新トラックバック
月別アーカイブ
カテゴリ
スポンサード リンク
マクロミルへ登録
FC2カウンター
検索フォーム
RSSリンクの表示
リンク
ブロとも申請フォーム

この人とブロともになる

QRコード
QR