软件测试工程师笔试题 目录 一、计算机知识 二、测试知识 三、数据库 四、编程题 一、计算机知识 1、在Linux系统中，一个文件的访问权限是755，其含义是什么？...2、Linux中，如何从root用户切换到普通用户？...7、说出4种及以上常用的操作系统及其主要的应用范围（微软操作系统除外） 参考答案： Linux（Red Hat、SUSE、Debian、Trubo Linux）：主要用于搭建各类服务器 MAC OS：...select s# ,sn from s where S# in(select S# from c,sc where c.c#=sc.c# and cn=’税收基础’) (2) 使用标准SQL嵌套语句查询选修课程编号为...select sn,sd from s where s# in(select s# from sc group by s# having count(distinct c#)>5) 四、编程题 编程输出
vm.max_map_count = 655360" >>/etc/sysctl.conf && sysctl -p if [ ${sys_mem} -eq 0 ];then sed -i "s#...`grep "^-Xmx" ${jvm_conf}`#"-Xmx512m"#g" ${jvm_conf} sed -i "s#`grep "^-Xms" ${jvm_conf}`#"-Xms512m..."#g" ${jvm_conf} else sed -i "s#`grep "^-Xmx" ${jvm_conf}`#"-Xmx${sys_mem}g"#g" ${jvm_conf} sed... -i "s#`grep "^-Xms" ${jvm_conf}`#"-Xms${sys_mem}g"#g" ${jvm_conf} fi cat >>/usr/local/elasticsearch/..._64.tar.gz mv filebeat-5.4.1-linux-x86_64 /usr/local/filebeat cat >/usr/local/filebeat/filebeat.yml<<
header: \"server: end\""); 修改上面4个文件，我们已将nginx服务器名修改为了end，如果不想去找到文件一个一个修改，也可以使用sed命令直接替换： #执行更名操作 sed -i "s#...\"NGINX\"#\"end\"#" src/core/nginx.h sed -i "s#\"nginx/\"#\"END/\"#" src/core/nginx.h sed -i "s#Server...: nginx#Server: end#" src/http/ngx_http_header_filter_module.c sed -i "s#\"nginx<\/center...with-http_stub_status_module --with-http_gzip_static_module make make install 启动Nginx /usr/local/nginx/sbin/nginx 测试 [root@linux
[root@znix ~]# sed 's#[0-9]##' person.txt 01,oldboy,CEO 02,zhangyao,CTO 03,Alex,COO 04...s#^(.*)0:....2.4.2 环境变量（全局变量） 2.4.2.1 特点 1）大写 2）在linux里面都生效 2.4.2.2 查看系统中的环境变量 使用env命令，可以列出系统中，所有的变量 [root@znix scripts...]# env HOSTNAME=znix TERM=linux SHELL=/bin/bash HISTSIZE=1000 SSH_CLIENT=10.0.0.1 3156 22 SSH_TTY=/dev...:5,$s#$1#$a#g 从第5行到最后一行进行替换 :1,$s#$1#$a#g 从第一行到最后一行进行替换 :%s#$1#$a#g 从第一行到最后一行进行替换 :.s,$s#echo#sed#g
/sedawkfindreplace1.sh # (c) 2017.5.22 vfhky https://typecodes.com/linux/sedawkfindreplace3.html # https...sh # Dir to be handled for windows. # SRC_DIR="/e/typecodes.com/vfhky/src" # Dir to be handled for Linux..."-$(RM) $(ULT_BIN)" with "-$(RM) $(ULT_BIN) $(ULT_LIBS)" using sed command. ## 替换 sed -i 's#...\$(CURDIR)\/\%.o: \%.cpp$#\$(CURDIR)\/\%.o: \$(CURDIR)\/\%.cpp#g' ${FILE} ## 替换 sed -i 's#\$...(CURDIR)\/\%.o: \%.c$#\$(CURDIR)\/\%.o: \$(CURDIR)\/\%.c#g' ${FILE} ## 替换 sed -i 's#$(bin).o
[root@webc ~]# sed -i "s#/home/wwwroot/default#/wdata/http/www#g" /usr/local/apache/conf/httpd.conf ...[root@webc ~]# sed -i "s#/home/wwwroot/default#/wdata/http/www#g" /usr/local/apache/conf/extra/httpd-vhosts.conf... [root@webc ~]# sed -i "s#/var/log/wwwlogs#/var/log/wwwlogs#g" /usr/local/apache/conf/httpd.conf... [root@webc ~]# sed -i "s#/var/log/wwwlogs#/var/log/wwwlogs#g" /usr/local/apache/conf/extra/httpd-vhosts.conf... [root@webc ~]# sed -i "s#/var/www#/wdata/http/www#g" /usr/local/apache/conf/extra/httpd-vhosts.conf
linux系统运维企业常见面试题集合（三） 01 写一个sed命令，修改/tmp/input.txt文件的内容，要求：(1) 删除所有空行；(2) 一行中，如果包含"11111"，则在"11111"前面插入...000011111222222 11111000000222 111111111111122222222222 2211111111 112222222 1122 插入指定的字符 [root@~]# sed 's#...awk -F '[ :]+' 'NR==2 {print $4}' 192.168.1.22 方法三： [root@apache ~]# ifconfig eth0|sed -n '2p'|sed 's#...*addr:##g'|sed 's# Bc....*$##g' 192.168.1.22 方法四： [root@apache ~]# ifconfig eth0|sed -n '2p'|sed -r 's#^.
Linux 以root用户登录后无法打开chrome谷歌浏览器 环境 $ uname -a Linux ai 5.15.0-48-generic #54-Ubuntu SMP Fri Aug 26 13...:26:29 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux 复现 在Ubuntu系统中点击 chrome 图标打开chrome浏览器 $ /snap/bin/chromium...[0929/030013.219204:ERROR:nacl_helper_linux.cc(315)] NaCl helper process running without a sandbox!...favorite-apps 2> /dev/null) if echo "$FAVS" | grep -q "'$OLD'"; then NEWFAVS=$(echo $FAVS | sed -e "s#...com.canonical.Unity.Launcher favorites 2> /dev/null) if echo "$FAVS" | grep -q "'$OLD'"; then NEWFAVS=$(echo $FAVS | sed -e "s#
device-mapper-persistent-data lvm2 yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux.../centos/docker-ce.repo dnf install https://mirrors.aliyun.com/docker-ce/linux/centos/7/x86_64/stable/...device-mapper-persistent-data lvm2 yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux...device-mapper-persistent-data lvm2 yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux...CONTAINER-RUNTIME binghe101 Ready master 5m43s v1.18.2 192.168.175.101 CentOS Linux
I teach linux. I like badminton ball ,billiard ball and chinese chess!...I teach linux. I like badminton ball ,billiard ball and chinese chess!...[root@znix ~]# ifconfig eth0|sed -n '2p'|sed 's#^.*dr:##g'|sed 's# ....[root@znix ~]# ifconfig eth0|sed -n '2p'|sed -r 's#^....[root@znix ~]# stat /etc/hosts |sed -n '4s#^.*(0##gp'|sed 's#/.
Reusable-Cluster-Components-glue--glue-1.0.9.tar.bz2 Heartbeat-3-0-7e3a82377fa8.tar.bz2 下载地址：http://linux-ha.org.../wiki/Downloads 说明：安装时需要能连接到公网 OS：Red Hat Enterprise Linux Server release 5.8 x64, 5.5 x64 kernel: 2.6.18...heartbeat chkconfig heartbeat on chmod 600 /usr/local/heartbeat/etc/ha.d/authkeys sed -i 's#...usr/lib/ocf#/usr/local/heartbeat/usr/lib/ocf#g' /usr/local/heartbeat/etc/ha.d/shellfuncs sed -i 's#...local/heartbeat/usr/lib/ocf#g' /usr/local/heartbeat/usr/lib/ocf/lib/heartbeat/ocf-shellfuncs sed -i 's#
卡中（原始镜像采用2018-04-18-raspbian-stretch树莓派官方系统） 更换源 一步操作 直接执行以下两步，即可替换将官方默认软件源替换为 中科大镜像源 $ sudo sed -i 's#...mirrordirector.raspbian.org#s://mirrors.ustc.edu.cn/raspbian#g' /etc/apt/sources.list $ sudo sed -i 's#...EXECUTABLE=/usr/bin/python3.5 PYTHON_INCLUDE_DIR=/usr/include/python3.5 PYTHON_LIBRARY=/usr/lib/arm-linux-gnueabihf...调整SD卡分区 使用工具： Linux Ubuntu gparted分区工具 安装gparted sudo apt-get install gparted 调整分区容量大小 ? ? ? ? ?...参考 https://www.jianshu.com/p/67b9e6ebf8a0 http://www.rabbit8.cn/609.html https://linux.cn/article-8477
2015-11-15 06:30:02 阅读( 383 ) Student(S#,Sname,Sage,Ssex) 学生表 Course(C#,Cname,T#) 课程表 SC(S#,C#,score)...成绩表 Teacher(T#,Tname) 教师表 问题： 1、查询“001”课程比“002”课程成绩高的所有学生的学号； select a.S# from (select s#,score from...; 2、查询平均成绩大于60分的同学的学号和平均成绩； select S#,avg(score) from sc group by S# having avg(score) >60; 3、查询所有同学的学号...,Sname from Student where S# in (select S# from SC ,Course ,Teacher where SC.C#=Course.C# and Teacher.T...,AVG(score) 平均成绩 FROM SC GROUP BY S# ) T1 WHERE 平均成绩 > T2.平均成绩) 名次, S# 学生学号,平均成绩 FROM (SELECT S#,AVG(
整理了一些的sql语句供大家看看，非常熟悉的同志就当坐车时的休闲吧 Student(S#,Sname,Sage,Ssex) 学生表 S#：学号；Sname：学生姓名；Sage：学生年龄；...S#：学号；C#,课程编号；score：成绩 Teacher(T#,Tname) 教师表 T#：教师编号； Tname：教师名字 问题： 1、查询“001...”课程比“002”课程成绩高的所有学生的学号； select a.S# from (select s#,score from SC where C#='001') a,(select s#,score...from SC where C#='002') b where a.score>b.score and a.s#=b.s#; 2、查询平均成绩大于60分的同学的学号和平均成绩； select S#...,avg(score) from sc group by S# having avg(score) >60; 3、查询没有学全所有课的同学的学号、姓名； select Student.S
---------------------------------- SNMP Versions Supported: 1 2c 3 Building for: linux.../sedscript.in | /bin/grep -E '^s[/#]' | sed 's/REMOVEME//g;s# \*/#/#g;s/ \*#/#/g;s#/ \*#/#g;s/# g/#g/
Student(S#,Sname,Sage,Ssex) 学生表 Course(C#,Cname,T#) 课程表 SC(S#,C#,score) 成绩表 Teacher(T#,Tname) 教师表 问题...select S#,avg(score) from sc group by S# having avg(score) >60; 3、查询所有同学的学号、姓名、选课数、总成绩；...,Sname from Student where S# in (select S# from SC ,Course ,Teacher where SC.C#=Course.C# and Teacher.T...'); 48、查询两门以上不及格课程的同学的学号及其平均成绩 select S#,avg(isnull(score,)) from SC where S# in (select S# from SC where...score )group by S#; 49、检索“004”课程分数小于60，按分数降序排列的同学学号 select S# from SC
50个常用的sql语句 Student(S#,Sname,Sage,Ssex) 学生表 Course(C#,Cname,T#) 课程表 SC(S#,C#,score) 成绩表 Teacher(T#,Tname...； select S#,avg(score) from sc group by S# having avg(score) >60; 3、查询所有同学的学号、姓名、选课数、总成绩；...,Sname from Student where S# in (select S# from SC ,Course ,Teacher where SC.C#=Course.C# and Teacher.T...'); 48、查询两门以上不及格课程的同学的学号及其平均成绩 select S#,avg(isnull(score,0)) from SC where S# in (select S# from...S#='001'and C#='001';
*#key_buffer_size = 32M#" /etc/my.cnf sed -i "s#^table_open_cache....*#query_cache_size = 16M#" /etc/my.cnf sed -i "s#^tmp_table_size....*#key_buffer_size = 64M#" /etc/my.cnf sed -i "s#^table_open_cache....*#query_cache_size = 32M#" /etc/my.cnf sed -i "s#^tmp_table_size....*#query_cache_size = 64M#" /etc/my.cnf sed -i "s#^tmp_table_size.
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