/*cd指令    *跳至到XX目录下，从Xshell远程登陆进去的目录是/root   *cd .. 返回上一层目录   */[root@Lettiy ~]# cd /usr/local/*ls    显示当前目录下的所有文件*/[root@Lettiy local]# lsaegis  bin  etc  games  include  lib  lib64  libexec  sbin  share  src

/*mkdir
　　新建，可以是目录，可以是文件
*/
[root@Lettiy ~]# mkdir mytest
[root@Lettiy ~]# ls
mytest
[root@Lettiy mytest]# mkdir text.txt
[root@Lettiy mytest]# ls
text.txt

/*mv    可用于改名、也可用于移动*/[root@Lettiy mytest]# mv text.txt newname.txt[root@Lettiy mytest]# lsnewname.txt[root@Lettiy mytest]# mv newname.txt newdir[root@Lettiy mytest]# lsnewdir[root@Lettiy mytest]# cd newdir[root@Lettiy newdir]# lsnewname.txt

/*rm    用于删除文件    普通删除文件用rm -f xx    普通目录删除  rm -rf xx    批量删除同一名字 rm -v xx*  （此处*类似于通配符）*/[root@Lettiy newdir]# lsnew1  new2  new3  new4  newname.txt[root@Lettiy newdir]# rm -f newname.txt[root@Lettiy newdir]# lsnew1  new2  new3  new4[root@Lettiy newdir]# rm -rf new4.txt[root@Lettiy newdir]# lsnew1  new2.  new3[root@Lettiy newdir]# rm -rf -v new*removed directory: ‘new1’removed directory: ‘new2’removed directory: ‘new3’

/*wget    文件下载    wget url即可*/[root@Lettiy newdir]# wget http://mirrors.hust.edu.cn/apache/tomcat/tomcat-7/v7.0.79/bin/apache-tomcat-7.0.79.tar.gz

--2017-08-13 23:35:56--  http://mirrors.hust.edu.cn/apache/tomcat/tomcat-7/v7.0.79/bin/apache-tomcat-7.0.79.tar.gz
Resolving mirrors.hust.edu.cn (mirrors.hust.edu.cn)... 202.114.18.160
Connecting to mirrors.hust.edu.cn (mirrors.hust.edu.cn)|202.114.18.160|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 8975395 (8.6M) [application/octet-stream]
Saving to: ‘apache-tomcat-7.0.79.tar.gz

100%[================================================================================>] 8,975,395   19.3KB/s   in 4m 36s

2017-08-13 23:40:33 (31.8 KB/s) - ‘apache-tomcat-7.0.79.tar.gz’ saved [8975395/8975395]

/*tar    对于tar.gz文件进行解压，解压为rpm文件再安装    tar -zxvf  */

[root@Lettiy newdir]# ls
apache-tomcat-7.0.79.tar.gz
[root@Lettiy newdir]# tar -zxvf apache-tomcat-7.0.79.tar.gz
apache-tomcat-7.0.79/bin/catalina.sh
apache-tomcat-7.0.79/bin/configtest.sh
apache-tomcat-7.0.79/bin/daemon.sh
apache-tomcat-7.0.79/bin/digest.sh
……
[root@Lettiy newdir]# ls
apache-tomcat-7.0.79  apache-tomcat-7.0.79.tar.gz

/*yum 安装/卸载   yum install software
   yum remove software*/[root@Lettiy newdir]#  yum install postgresql

/*查看yum可安装的软件包,可配合grep进行关键字查询，例如‘java’*/
[root@Lettiy newdir]# yum list
[root@Lettiy newdir]# yum list|grep ‘java‘

/*rpm   刚刚解压tar得到的rpm文件则需要使用rpm   安装rpm -ivh
   删除rpm -e
   查看已经安装rpm -qa*/
[root@Lettiy newdir]# rpm -ivh software.rpm

/*文件查看    cat指令、more指令、vi指令三者都可以实现查看*/[root@Lettiy newdir]# cat /etc/profile# /etc/profile# System wide environment and startup programs, for login setup# Functions and aliases go in /etc/bashrc# It‘s NOT a good idea to change this file unless you know what you# are doing. It‘s much better to create a custom.sh shell script in# /etc/profile.d/ to make custom changes to your environment, as this# will prevent the need for merging in future updates.pathmunge () {    case ":${PATH}:" in        *:"$1":*)            ;;        *)            if [ "$2" = "after" ] ; then                PATH=$PATH:$1            else                PATH=$1:$PATH            fi    esac}if [ -x /usr/bin/id ]; then    if [ -z "$EUID" ]; then        # ksh workaround        EUID=`/usr/bin/id -u`        UID=`/usr/bin/id -ru`    fi    USER="`/usr/bin/id -un`"    LOGNAME=$USER    MAIL="/var/spool/mail/$USER"fi# Path manipulationif [ "$EUID" = "0" ]; then    pathmunge /usr/sbin    pathmunge /usr/local/sbinelse    pathmunge /usr/local/sbin after    pathmunge /usr/sbin afterfiHOSTNAME=`/usr/bin/hostname 2>/dev/null`HISTSIZE=1000if [ "$HISTCONTROL" = "ignorespace" ] ; then    export HISTCONTROL=ignorebothelse    export HISTCONTROL=ignoredupsfiexport PATH USER LOGNAME MAIL HOSTNAME HISTSIZE HISTCONTROL# By default, we want umask to get set. This sets it for login shell# Current threshold for system reserved uid/gids is 200# You could check uidgid reservation validity in# /usr/share/doc/setup-*/uidgid fileif [ $UID -gt 199 ] && [ "`/usr/bin/id -gn`" = "`/usr/bin/id -un`" ]; then    umask 002else    umask 022fifor i in /etc/profile.d/*.sh ; do    if [ -r "$i" ]; then        if [ "${-#*i}" != "$-" ]; then             . "$i"        else            . "$i" >/dev/null        fi    fidoneunset iunset -f pathmungeexport JAVA_HOME=/usr/develop/java/jdk1.8.0_144export PATH=$JAVA_HOME/bin/:$PATHexport CLASSPATH=$JAVA_HOME/jre/lib/ext:$JAVA_HOME/lib/tools.jarexport CATALINA_HOME=/usr/develop/tomcat/apache-tomcat-8.5.20

/*vi   vi directory   如果目录下存在则打开   如果不存在则新建一个空文件 */如果要修改，进入按 I  ,即可进入insert模式，进行更改；保存：先ESC，然后输入： wq:保存退出q!:不保存退出主要用于修改配置文件 ,例如：etc/proflie

/*ps   检测软件是否运行   或查看正在运行的进程   ps -ef|grep ‘name‘    例如：检测tomcat的运行状况*/[root@Lettiy newdir]# ps -ef|grep ‘tomcat‘root     19785     1  0 Aug12 ?        00:01:05 /usr/develop/java/jdk1.8.0_144/bin/java -Djava.util.logging.config.file=/usr/develop/tomcat/apache-tomcat-8.5.20/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -classpath /usr/develop/tomcat/apache-tomcat-8.5.20/bin/bootstrap.jar:/usr/develop/tomcat/apache-tomcat-8.5.20/bin/tomcat-juli.jar -Dcatalina.base=/usr/develop/tomcat/apache-tomcat-8.5.20 -Dcatalina.home=/usr/develop/tomcat/apache-tomcat-8.5.20 -Djava.io.tmpdir=/usr/develop/tomcat/apache-tomcat-8.5.20/temp org.apache.catalina.startup.Bootstrap startroot     22647 22470  0 23:58 pts/0    00:00:00 grep --color=auto tomcat

/*netstat   netstat -tl  查看当前tcp监听端口   netstat -tlp 查看当前tcp监听端口, 需要显示监听的程序名,当不清楚mysql的监听端口时比较好用   netstat -tl | grep 34006    只查看mysql的监听端口,当前启动的mysql端口为34006,明确知道mysql监听端口时使用*/