shell脚本示例
发几个自己以前写的脚本，其中有两个监控系统状态的简单脚本，修改一下可以直接拿来用。用到的方法，在我的shell学习笔记系列中都有介绍。由于脚本都比较简单，就不写那么多注释了，有需要修改借用的朋友可以在此留言。
##############################################################
# add 20 users one time
i=1
num=20
pass=123456
while [ "$i" -le "$num" ]
do
user="stu$i"
if grep "$user" /etc/passwd >/dev/null
then
:
else
useradd "$user"
# passwd "$user" >/dev/null 2>&1 << EOF
#$pass
#$pass
#EOF
echo "$pass" | passwd --stdin "$user" >/dev/null 2>&1
fi
i=$((i+1))
done
# End of script
##############################################################
# To monitor cpu load by cmd "uptime"
# By licong on 2009/09/30
out_file=/tmp/uptime.out
mail_to="[email protected]"
load_limit=1
> $out_file
field=$((`uptime | awk '{print NF}'` - 2))
load=$(uptime | awk '{print $'$field'}' | sed 's/,//')
load_int=$(echo $load | sed 's/\..*//')
if [ $load_int -ge $load_limit ]; then
(
echo -e "Load of cpu has exceeded $load \n"
date
echo
uptime
) > $out_file
fi
if [ -n $out_file -a -s $out_file ]; then
sendmail -f $mail_from -s "Load warming" $mail_to < $out_file
fi
rm -rf $out_file
# End of script
##############################################################
# My version of cp, ask for conferm
this_script=$(basename $0)
if [ $# -ne 2 ]
then
echo "Usage: $this_script from to"
exit 1
fi
from="$1"
to="$2"
if [ -e "$to" ]
then
echo -e "$to exists, overwrite (yes/no)? \c"
read answer
if [ "$answer" != yes ]
then
echo "copy not performed"
exit 0
fi
else
cp "$from" "$to"
fi
# End of script
##############################################################
# 带邮件通知功能的磁盘监控脚本。
#
# Monit using of disk bf "df -m"
# By licong on 2009/09/25
#
PCW_limit=75
PCA_limit=90
df_file=/tmp/df.out
echo -e "\n$(date)\n" > "$df_file"
#df -m | egrep -v '/dev/shm|cdrom|proc|Filesy' | # for fs without lvm
df -m | sed 's/^ *//;/^[0-9]/!d' | # for fs with lvm
while read MB_total MB_used MB_free used dev_mount
do
PC_used=$(echo $used | cut -d% -f1)
if [ $PC_used -ge $PCW_limit -a $PC_used -lt $PCA_limit ]
then
echo "Warning: $dev_mount used has exceded $used !" >> "$df_file"
elif [ $PC_used -ge $PCA_limit ]
then
echo "Alarm: $dev_mount used has exceded $used !" >> "$df_file"
fi
done
echo >> "$df_file"
[ -n "$df_file" -a -s "$df_file" ] && mail -s "Warming of disk!" [email protected] < "$df_file"
rm -rf "$df_file"
# End of script
##############################################################
# 整理文档用的，把/data目录下所有.swf文件移动到子目录下，
# 子目录的名字取文件名的前2个字符；如果文件名只有
# 1个字符，则目录名为2个重叠的该字符
cd /data
ls | grep '.swf' > filelist
while read filename
do
mkdir -p ${filename:0:2}
mv ${filename} ${filename:0:2}
done < filelist
ls -1 | awk -F'.' '{
if (length($1)==1)
{
if (-d "$1$1")
{
system("mv "$0"/* "$1$1)
system("rm -rf lib/en/"$0)
}
else
{system("mv "$0" "$1$1)}
}
}'
# End of script