sometime, to make your change of configuration file be effective to web application, we have to restart the tomcat again then reload the memory cache. of course,if you are senior engineer with rich experience on the environmental infos , you will kno…

FROM: http://www.tecmint.com/15-basic-ls-command-examples-in-linux/ ls command is one of the most frequently used command in Linux. I believe ls command is the first command you may use when you get into the command prompt of Linux Box. We use ls com…

FROM: http://www.tecmint.com/18-tar-command-examples-in-linux/ 18 Tar Command Examples in Linux By Ravi Saive Under: CentOS, Fedora, Linux Commands, Linux Distros, RedHat On: September 15, 2012 The Linux “tar” stands for tape archive, which is used b…

有时候执行一个脚本或者运行一个可执行文件时,如执行脚本./foo.sh,会报错-bash: ./foo.sh: Permission denied,你会再试sudo ./foo.sh,发现继续报错sudo: foo.sh: command not found,这时候可能是因为该文件没有执行权限,可以通过ls -l foo.sh查看文件信息,如果确实没有,可以为文件增加执行权限 chmod +x foo.sh 这个时候就可以运行了. 参考Command not found when using s…

文章转自: http://www.cyberciti.biz/faq/debian-ubuntu-rhel-centos-linux-bash-sudo-command-not-found/ 安装sudo $ su - and install sudo apt-get install sudo 修改sudo sudo vi /etc/sudoers 安装红色的那一行,添加一个用户 # # This file MUST be edited with the 'visudo' command as…

Cat (串联) 命令是Linux/Unix开源系统中比较常用的一个命令.我们可以通过Cat命令创建一个或多个文件,查看文件内容,串联文件并将内容输出到终端设备或新的文件当中,这篇文章我们将会以实例的方式讲解Linux中cat命令一些简便的用法. The cat (short for "concatenate") command is one of the most frequently used command in Linux/Unix like operating systems…

Question: I have an interactive shell script, that at one place needs to ssh to another machine (Ubuntu based) and execute something as root (the user should enter his password, but the remote command should run like noted in the script): # ... ssh r…

FROM: http://www.tecmint.com/13-basic-cat-command-examples-in-linux/ The cat (short for “concatenate“) command is one of the most frequently used command in Linux/Unix like operating systems. cat command allows us to create single or multiple files,…

You should get a grip on the Linux grep command. This is part of the on-going 15 Examples series, where 15 detailed examples will be provided for a specific command or functionality.  Earlier we discussed 15 practical examples for Linux find command,…

** 一般要考虑最近是否有别人或者自己修改过环境变量,这种报错往往是因为环境变量设置错误导致的. ** 1. 首先要获得创建,或者是打开bash_profile的权限,请在命令行中输入: export PATH=/usr/bin:/usr/sbin:/bin:/sbin:/usr/X11R6/bin 可以实现bash_profile暂时的使用. 2.输入cd ~/ #进入当前用户的home目录 3.创建bash_profile 执行命令: touch .bash_profile 4.打开并编辑b…