1.输出1-10
echo {1..10}
seq -s' ' 1 10 #默认分隔符\n
for((i=1;i<=10;i++));do echo -n "$i ";done;echo #最后echo为了换行
i=1;while [ $i -le 10 ];do printf "%s " $i;i=$[$i+1];done;echo
awk 'BEGIN{for(i=1;i<=10;i++) printf "%s ",i;}';echo2.随机选人功能（while & 数组）
比如pick.sh 2,则显示两个人tom sam
#!/bin/bash
com=`basename $0`
num=$1 #选取人数
member=(sam tom jack marry terry) #定义数组
total=${#member[@]} #总数5
if [ $# -lt 1 -o $# -gt 1 ]; then #判断参数是否是一个
echo "$com {[1-$total]}"
exit 4
fi
if [ $num -le $total -a $num -gt 0 ]; then #判断选取人数在1-5
while [ $num -ge 1 ]; do
rand=`echo "$RANDOM%$total" | bc` #取随机数0-4
if [ -n "${member[$rand]}" ]; then #判断数值是否为空
echo -n "${member[$rand]} "
unset member[$rand] #删除数组值
let num--
fi
done
else
echo "$com {[1-$total]}"
fi
echo3. 查询某字符串所在行号
查询hadoop用户在/etc/passwd中的行号
grep -n '^hadoop:' /etc/passwd | cut -d: -f1
awk '/^hadoop:/{print NR}' /etc/passwd4.文件备份（tar & find）
使用tar备份和find删除大于3天的备份文件
#!/bin/bash
list=/tmp/backup.list #备份文件列表
ddir=/tmp/b #备份路径
day=2 #备份保留天数
echo "[Backup]" >> /tmp/backup.log
echo "start: `date +%F-%T`" >> /tmp/backup.log
if [ ! -f $list ]; then
echo "$list doesn't exists."
echo -e "[END]\n" >> /tmp/backup.log
fi
[ -d "$ddir" ] || mkdir -p $ddir &> /dev/null
for file in `cat $list`; do
tar jcf $ddir/`basename $file`-`date +%F-%H-%M-%M`.tar.bz2 $file &> /dev/null
if [ $? -eq 0 ]; then
echo "File: $file backup successfully." >> /tmp/backup.log
else
echo "file: $file backup failed." >> /tmp/backup.log
fi
done
echo "end: `date +%F-%T`" >> /tmp/backup.log
echo -e "[Backup end]\n" >> /tmp/backup.log
for bakfile in $ddir/*; do
find $ddir -mtime +$day -exec rm $ddir/$bakfile {} \; #删除3天前的备份文件
done5.初始化Linux配置文件
用于光安装好的CentOS 5/6初始化
运行脚本前先要把Linux光盘放入
#!/bin/bash
# init linux config
# 2014-02-17
#chech os version
version=$(grep -o "[0-9]\.[0-9]" /etc/issue | cut -d . -f1)
#shutdown iptables & selinux & NetworkManager
iptables -F
service iptables save &> /dev/null
sed -i s/SELINUX=enabled/SELINUX=disabled/g /etc/selinux/config
service NetworkManager stop &> /dev/null
#backup etc & yum repo
[ -e /backup ] || mkdir /backup
tar zcf /backup/etc.tar.gz /etc &> /dev/null
find /etc/yum.repos.d/ -type f -exec mv {} /etc/yum.repos.d/old \; &> /dev/null
#add yum repo from cdrom
if [ "$version" -eq 5 ]; then
cat > /etc/yum.repos.d/cdrom.repo << EOF
[cdrom]
name=local source
baseurl=file:///mnt/cdrom/Server
gpgcheck=0
enabled=1
EOF
elif [ "$version" -eq 6 ]; then
cat > /etc/yum.repos.d/cdrom.repo << EOF
[cdrom]
name=local source
baseurl=file:///mnt/cdrom/
gpgcheck=0
enabled=1
EOF
fi
#mount cdrom
[ -e /mnt/cdrom ] || mkdir /mnt/cdrom
grep "/dev/cdrom" /etc/fstab &> /dev/null
if [ ! $? -eq 0 ]; then
cat >> /etc/fstab << EOF
/dev/cdrom /mnt/cdrom/ iso9660 defaults,loop,ro 0 0
EOF
fi
mount -a6.复制命令至/mnt/test下；以/mnt/test作为根（chroot /mnt/test），进行测试。
#!/bin/bash
# cp Command to other
# 2014-2-19
TargetDir=/mnt/test
[ -d $TargetDir ] || mkdir -p $TargetDir
#5秒不输入，就为默认值q，退出
read -t 5 -p "Input A Command: " Command
Command=${Command:-q}
#循环，直到输入q或Q后，退出
while [ "$Command" != 'q' -a "$Command" != 'Q' ]; do
#复制命令
Command=`which $Command | grep -v "^alias" | grep -o [^[:space:]].*`
ComDir=${Command%/*}
[ -d ${TargetDir}/${ComDir} ] || mkdir -p ${TargetDir}/${ComDir}
[ -f ${TargetDir}/${Command} ] || cp $Command ${TargetDir}/${Command} && echo "Copy $Command to $TargetDir finished."
#复制命令所用到的库文件
for LIB in `ldd $Command | grep -o "[^[:space:]]*/lib[^[:space:]]*"`; do
LIBDir=${LIB%/*}
[ -d ${TargetDir}/${LIBDir} ] || mkdir -p ${TargetDir}/${LIBDir}
[ -f ${TargetDir}/${LIB} ] || cp $LIB ${TargetDir}/${LIB} && echo "Copy $LIB to $Target finished."
done
read -p "Input your command: " Command
done7.Oracle VM虚拟机在线统计
#!/bin/bash
# 统计oracle vm虚拟机在线数量
# 2014-02-20
#列出在线数量
xm list | grep -v ^Name | grep -v ^Domain-0 | awk '{print $1,$2}' > /backup/onlinevm.txt
#列出虚拟机总数
grep -R "OVM_simple_name" /OVS/Repositories/0004fb0000030000a95eee3c2b21307a/VirtualMachines/* | awk 'BEGIN{FS="/"}{print $6,$7}' | awk '{print $1,$4}' > /backup/allvm.txt
#合并两个文档
join /backup/onlinevm.txt /backup/allvm.txt > /backup/test.txt
awk 'BEGIN{printf("\033[1;31m%-35s%-5s%-5s\033[0m\n","UUID","ID","HOST")};{printf("%-35s%-5s%-5s\n",$1,$2,$3)}' /backup/test.txt
#显示在线数量
num=$(cat /backup/onlinevm.txt | wc -l)
echo -e "\e[32mTotal $num VM Running.\e[0m"
8.mysql-5.5.33通用安装包安装
运行时，脚本与mysql安装包放在一个文件夹下。
#!/bin/bash
# 通用包格式安装mysql
# 2014-02-21
Software=mysql-5.5.33-linux2.6-x86_64.tar.gz
MysqlDir=/usr/local/mysql
DataDir=/mydata/data
CpuNum=`cat /proc/cpuinfo | grep processor | wc -l`
#创建mysql用户
id mysql &> /dev/null || useradd -r mysql
#创建mysql数据库文件夹
[ -d /mydata/data ] || mkdir -p /mydata/data
chown mysql.mysql -R /mydata/data
#安装mysql
tar xf $Software -C /usr/local
ln -s /usr/local/mysql-5.5.33-linux2.6-x86_64 $MysqlDir
chown root.mysql -R ${MysqlDir}/*
cp /usr/local/mysql/support-files/my-large.cnf /etc/my.cnf -f
#修改配置，线程数和CPU个数相同
sed -i s/"thread_concurrency = 8"/"thread_concurrency = $CpuNum"/ /etc/my.cnf
#修改配置，在[mysql]后插入adatadir = /mydata/data
sed -i '/\[mysqld\]/adatadir = /mydata/data' /etc/my.cnf
#复***务器启动文件
cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
chkconfig --add mysqld
#安装mysql
yum install -y libaio &> /dev/null
#进入到mysql文件夹才能，运行下面的安装命令
cd /usr/local/mysql
scripts/mysql_install_db --user=mysql --datadir=/mydata/data
#配置环境变量
cat > /etc/profile.d/mysql.sh << EOF
export PATH=/usr/local/mysql/bin:\$PATH
EOF
