Linux Use shell scripts to delete history log files at regular intervals
- 2021-08-21 22:03:01
- OfStack
1. tools directory file structure
[root@www tools]# tree tools/
tools/
-- bin
The -- del_history_files
The
Off- etc
-- del_history_files.cfg
2 directories, 2 files
2. Delete the history file script del_history_files
[root@www tools]# more tools/bin/del_history_files
#!/bin/sh
# Delete files in the specified directory whose file time is earlier than the specified time node, time granularity: hours
# Configuration file format : Directories to clean up = Hours
#
#
# define restricted path
PATH="/bin:/usr/bin:/sbin:/usr/sbin"
# adirname - return absolute dirname of given file
adirname() { odir=`pwd`; cd `dirname $1`; pwd; cd "${odir}"; }
# ---------
# constants
# ---------
MYNAM=`basename "$0"`
MYDIR=`adirname "$0"`
MYCFG="${MYDIR}/../etc/${MYNAM}.cfg"
MYTMP="${MYDIR}/../tmp"
MYLCK="${MYTMP}/${MYNAM}.lock"
# perform some locking (as good as it gets in a shell)
[ -s "${MYLCK}" ] && kill -0 `cat "${MYLCK}"` 2>/dev/null &&
die "${MYNAM}: already running!"
echo "$$" > "${MYLCK}"
PATHS=(`cat ${MYCFG}`)
for PP in ${PATHS[@]}
do
APP_PATH=`echo ${PP} | awk -F'=' '{print $1}'`
N=`echo ${PP} | awk -F'=' '{print $2}'`
if [ -d ${APP_PATH} ] ; then
T=`/bin/date --date "${N} hours ago" "+%Y%m%d%H%M"`
TMP_FILE="/tmp/`echo ${PP} | md5sum | awk '{print $1}'`"
touch -t ${T} ${TMP_FILE}
find ${APP_PATH} ! -newer ${TMP_FILE} -type f -print0 | xargs -0 -n 100 rm -rf
find ${APP_PATH} -type d -empty -print0 | xargs -0 -n 100 rm -rf &> /dev/null
fi
done
rm -rf ${MYLCK}
3. Delete the configuration file of the history file script del_history_files. cfg
[root@www tools]# more tools/etc/del_history_files.cfg
# Directories to clean up = Hours
/home/logs/nginx=720
/home/logs/varnish=720
4. crontab can be executed
[root@www tools]# more /etc/crontab
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root
HOME=/
#clear old logs
00 6 * * * root /home/tools/bin/del_history_files