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tldr，tldr全称Too long, Don’t read，翻译成中文就是[太长不读]。tldr根据二八原则将命令的常用场景给出示例，让人一看就懂。
yum install npm -y npm install -g tldr pip3 install tldr

tldr tar

From:https://www.cnblogs.com/xingxia/p/npm_tldr.html
More:https://www.hi-linux.com/posts/16098.html

mac安装并使用tldr:
https://blog.csdn.net/weixin_49268249/article/details/120403250

tldr ln

ln

Creates links to files and directories.
More information: <https://www.gnu.org/software/coreutils/ln>.

- Create a symbolic link to a file or directory:
    ln -s /path/to/file_or_directory path/to/symlink

- Overwrite an existing symbolic link to point to a different file:
    ln -sf /path/to/new_file path/to/symlink

- Create a hard link to a file:
    ln /path/to/file path/to/hardlink

下午发现服务器风扇一直转，然后 top 看了下，发现一个叫'systemdd-dev'的程序把 cpu 跑满了。
#uptime
22:53:21 up 46 days,  3:57,  1 user,  load average: 10.48, 10.73, 10.82

top看到：
一个叫'systemdd-dev'的程序把 cpu 跑满了。
polkitd  1310107    7584 99 7月23 ?       55-10:12:06 /tmp/.lib/systemdd-dev

ls /tmp/.lib/systemdd-dev
ls: 无法访问'/tmp/.lib/systemdd-dev': 没有那个文件或目录

strace -f -p 1310107
[pid 1366321] sched_yield()             = 0
[pid 1366320] sched_yield()             = 0
[pid 1366325] sched_yield()             = 0
[pid 1366328] sched_yield()             = 0


polkitd  1310107    7584 99 7月23 ?       55-09:43:59 /tmp/.lib/systemdd-dev

polkitd:x:998:996:User for polkitd:/:/sbin/nologin


#cat /proc/1310107/status
Name:   systemdd-dev
Umask:  0022
State:  S (sleeping)
Tgid:   1310107
Ngid:   0
Pid:    1310107
PPid:   7584
TracerPid:      0
Uid:    998     998     998     998
Gid:    998     998     998     998
Mems_allowed_list:      0
voluntary_ctxt_switches:        1498969
nonvoluntary_ctxt_switches:     119



解决办法：
从上面进程的父亲进程号：7584得知是git，于是定位到容器。
#ps -ef|grep 7584
root        7584    7541  0 6月12 ?       00:00:00 /bin/bash /assets/wrapper
root        8523    7584  0 6月12 ?       00:00:18 runsvdir -P /opt/gitlab/service log: .........................................................................................................................
root       11249    7584  0 6月12 ?       00:00:00 /bin/bash /opt/gitlab/bin/gitlab-ctl tail
root      925975  898775  0 22:52 pts/4    00:00:00 grep --color=auto 7584
polkitd  1309744    7584  0 7月23 ?       00:03:21 /bin/bash /tmp/.lib/systemdd-udevd
polkitd  1309748    7584  0 7月23 ?       00:00:17 /var/opt/gitlab/gitlab-workhorse/java
polkitd  1310107    7584 99 7月23 ?       55-10:12:06 /tmp/.lib/systemdd-dev

docker ps -a
1b1a3af4b528   gitlab/gitlab-ce           "/assets/wrapper"        15 months ago   Up 6 weeks (healthy)   0.0.0.0:8226->22/tcp, 0.0.0.0:8341->80/tcp, 0.0.0.0:8848->443/tcp   gitlab

docker stop 1b1a3af4b528

uptime   #负载下来了
23:01:18 up 46 days,  4:05,  1 user,  load average: 0.09, 2.41, 6.67

可能有黑客入住容器？

背景：干了十年模糊了英文的月份、周，特别是缩写，像rpmbuild打包的日志必须要缩写对，像Git提交日期都是英文的月份，所以这个英文是绕不开的，得捡起来，怎么捡起来先从Unix/Linux操作系统的cal 命令开始入门最好了。
rpmbuild打包：https://jackxiang.com/post/9689/
#rpmbuild  -ba openresty-1.19.9.1.el7.x86_64.spec  
错误：%changelog 没有按照时间顺序降序排列  
  
%changelog  
* Tue Mar 8 2022 dong xiang <xiangdong@staff.cntv.com>  
- Initial  openresty rpm package  
  
* Wed Feb 15 2017  1.11.2.5-%(date +%y%m%d%H%M%%S)  
-update openresty to 1.11.2.5


Git log：
git log index.html
Author: yuchangchun <yuchangchun @staff.xxxx.cn>
Date:   Thu May 26 17:06:22 2022 +0800  【Thu May】

    打包demo环境

最终，结论：export LC_TIME="zh_CN.UTF-8"，变中文，设置export LC_TIME="en_US.UTF-8"立即变英文。

Mac终端默认是中文：
export LC_TIME="en_US.UTF-8"
cal -y  #显示全年，也就知道了是5月周2。

~/.oh-my-zsh/.alias   设置zsh快捷键
alias scal='export LANG=en_US.UTF-8 && cal -y'


export LANG=zh_CN.UTF-8
echo $LANG
zh_CN.UTF-8

cal
cal
      七月 2022
日 一 二 三 四 五 六
                1  2
3  4  5  6  7  8  9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
31


export LANG=en_US.UTF-8
cal
     July 2022
Su Mo Tu We Th Fr Sa
                1  2
3  4  5  6  7  8  9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
31


locale -a  #列出所有支持的公共位置串里找到en_US.UTF-8
locale
LANG="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_CTYPE="zh_CN.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_ALL=


中文
LANG="zh_CN.UTF-8"
LC_COLLATE="zh_CN.UTF-8"
LC_CTYPE="zh_CN.UTF-8"
LC_MESSAGES="zh_CN.UTF-8"
LC_MONETARY="zh_CN.UTF-8"
LC_NUMERIC="zh_CN.UTF-8"
LC_TIME="zh_CN.UTF-8"
LC_ALL=

[程序员不高兴] 说:蓝奏云下载地址：：https://wwm.lanzouy.com/i5Yh2050755i

官网：https://effidit.qq.com/

网页版本：
https://effidit.qq.com/demo

更多操作：
https://mp.weixin.qq.com/s/mBF_PDF-Hp62N0Ji7pfyUQ

crontab这个定时工具单对于日期默认颗粒度是“单”，也就是单天，单周，单月等等，但是如果需要每双周发送一次消息，那么原生态的crontab就做不到了。
正确的写法是：
59 11 * * 5 expr `date +\%W` \% 2 > /dev/null || cd /opt/golangproject && ./DingdingBot > golang钉钉机器人.log 2>&1
echo $(date +\%W)   #date +\%W获取当前的周数
17

expr `date +\%W` \% 2    #一般用于整数值计算使用expr做算术运算
1



这个规则的意思就是每双周的周五11点59分，启动DINGdingBot这个脚本。

先说expr,这是一个计算命令，一般用于整数值，比如expr 14 % 9，返回就是5。那么这个脚本的意思就很明白了，先用date +\%W获取当前的周数，如果可以被2整除，就是0，0可以执行后面的语句，如果不能被2整除，那么后面的语句也就不会执行。其实说白了，就是每周五的11点59分，判断一下当前周数是否是2的倍数，如果是就可以去执行脚本，如果不是就无视掉。

最后推荐一个好网站可以查看crontab的效果：
https://tooltt.com/crontab-parse/
另一个工具感觉弱一点，但是验证（50 9 8-14,22-28 * 5好像又是对的，和此文作者说的不符合。）：
https://www.matools.com/crontab

，不过这个网站只能看基础的crontab配置，想玩花就不行了。

摘自：https://brucewayne2099.github.io/2020/09/12/%E6%AF%8F%E4%B8%A4%E5%91%A8%E6%89%A7%E8%A1%8C%E4%B8%80%E6%AC%A1%E5%AE%9A%E6%97%B6%E4%BB%BB%E5%8A%A1/

解决办法：
进入单用户 #fsck -p
#shutdown -r now

实践：
应该是直接进入单用户模式了：
fsck -y ; sync ;sync ;sync;reboot
vim /etc/fstab      #（dum=0, pass#=0），之前都是1，全改为0。
# 裝置名稱  掛入點  檔案系統   參數  Dump   Pass# /dev/gpt/rootfs / ufs rw  0  0

  学习的BSD的教材上，作者明确指出不要用reboot和halt执行重启和关机动作，那样系统不会执行rc.shutdown脚本导致不能在文件系统上设立“清除”标记，下次开机时系统会自动调用FSCK来检查文件系统一的。



异常掉电可能引起磁盘分区被标记为dirty，默认地，系统下一次启动时会运行fsck进行分区检查和错误恢复。如果fsck过程中某个操作需要用户干预或确认，而现在的应用没有使用显示器和键盘鼠标，启动过程可能无法继续进行。
1、编辑/etc/fstab，将分区标记为无须检查（dum=0, pass#=0），详见man fstab
2、编辑/etc/rc.conf，添加以下内容：
      fsck_y_enable="YES"
      fsck_background="NO"            

這個檔案用來定義開機時要掛入的檔案分割區。

# 裝置名稱  掛入點  檔案系統   參數  Dump   Pass#
/dev/ad0s1b  none  swap  sw 0  0
/dev/ad0s1a / ufs rw 1 1

原文链接：https://blog.csdn.net/ncdawen/article/details/574279


掛入點就是你要將來源掛到什麼地方，其中 swap 沒有掛入點，所以是 none。
檔案系統就是要掛入的類型，必須在 kernel 中有定義。一般 FreeBSD 的檔案是 ufs，硬碟要掛入的設定就是 ufs。如果是 cdrom 就是

cd9660。
ufs 本地的 UNIX 檔案系統。
mfs 本地的 memory-based UNIX 檔案系統。
nfs 和 Sun Microsystems 相容的 "Network File System"。
swap 用來作 swapping 的檔案系統。
msdos DOS 相容的檔案系統。
cd9660 CD-ROM 的檔案系統。
procfs 用來存取執行程序(process)的檔案系統。
kernfs 用來存取核心參數(kernel parameter)的檔案系統。
原文链接：https://blog.csdn.net/ncdawen/article/details/574279

理解谁干的，有可能是nm干的，或者黑客干的，极有可能是CentOS8引入两个管理网络的network和NetworkManager都启动后“打架”干的。

实际上这俩都开了：
systemctl  status network
● network.service - LSB: Bring up/down networking
   Loaded: loaded (/etc/rc.d/init.d/network; generated)
   Active: active (exited) since Sat 2022-03-26 05:56:48 CST; 9min ago
#systemctl  status NetworkManager
● NetworkManager.service - Network Manager
   Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
   Active: active (running) since Sat 2022-03-26 05:56:41 CST; 9min ago
     Docs: man:NetworkManager(8)
Main PID: 2465 (NetworkManager)
只开network的步骤：
一、都禁用：
systemctl mask network
Created symlink /etc/systemd/system/network.service → /dev/null.

systemctl mask NetworkManager
Created symlink /etc/systemd/system/NetworkManager.service → /dev/null.

二、启用一个：
/usr/lib/systemd/systemd-sysv-install enable network
#下面提示怎么启用：
systemctl enable network
network.service is not a native service, redirecting to systemd-sysv-install.
Executing: /usr/lib/systemd/systemd-sysv-install enable network

三、测试NetworkManager 被彻底禁用了：
systemctl start NetworkManager
Failed to start NetworkManager.service: Unit NetworkManager.service is masked.

mask彻底禁用systemctl服务:
https://blog.csdn.net/stpice/article/details/104569146/

----------------------------------------------------------
cd /etc/sysconfig/network-scripts/ifcfg-lanbr0
#cat ifcfg-
ifcfg-eno1    ifcfg-lanbr0  ifcfg-lo      

在桥接的网卡lanbr0新增：
/etc/sysconfig/network-scripts/
DNS1=202.106.196.115
DNS2=114.114.114.114

重启动后，会将/etc/resolv.conf的配置重新刷成上面的（测试过删除一行：nameserver 114.114.114.114,重启后会自动加上）：
#cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 202.106.196.115
nameserver 114.114.114.114

#cat ifcfg-eno1
DEVICE="eno1"
ONBOOT="yes"
BRIDGE="lanbr0"

#cat ifcfg-lanbr0
DEVICE="lanbr0"
ONBOOT="yes"
TYPE="Bridge"
BOOTPROTO="none"
IPADDR="10.10.0.1**"
NETMASK="255.255.255.0"
GATEWAY="10.10.0.1"
DNS1=202.106.196.115
DNS2=114.114.114.114
Centos重新启动网络配置文件，/etc/resolv.conf被覆盖或清空问题解决

cat short-if.go
package main import(         "fmt"         "math/rand"         "time" ) func main(){         rand.Seed(time.Now().Unix())         if num := rand.Intn(3); num == 0 {                 fmt.Println(num)                 fmt.Println("Space Adventures")         } else if num == 1 {                 fmt.Println(num)                 fmt.Println("SpaceX")         }else{                 fmt.Println(num)                 fmt.Println("Virgin Galactic")         } }

go build short-if.go  
./short-if
1
SpaceX

./short-if
2
Virgin Galactic

./short-if
0
Space Adventures


如果不加：
        rand.Seed(time.Now().Unix())

其值一直是：2

原因是：https://blog.csdn.net/weixin_33816821/article/details/94581126


Go语言的switch语法学习之num的简短声明也可用于switch语句的一部分：
package main import(         "fmt"         "math/rand"         "time" ) func main(){         rand.Seed(time.Now().Unix())         switch num := rand.Intn(10); num {         case 0:                 fmt.Println("Space Adventure")         case 1:                 fmt.Println("SpaceX")         case 2:                 fmt.Println("Virgin Galactic")         default:                 fmt.Println("Random spaceline #",num)         } }

./short-switch
Virgin Galactic

./short-switch  
Random spaceline # 4


cat scope-rules.go   #几月有多少天的一个判断：
package main import(         "fmt"         "math/rand"         "time" ) var era = "AD" func main(){         year := 2018         rand.Seed(time.Now().Unix())         switch month := rand.Intn(12) + 1;month {         case 2:             day  := rand.Intn(28) + 1             fmt.Println(era, year, month, day)         case 4, 6, 9, 11:             day := rand.Intn(30) + 1             fmt.Println(era, year, month, day)         default:             day := rand.Intn(31) + 1             fmt.Println(era, year, month, day)         } }


./scope-rules
AD 2018 10 24


        default:
            day := rand.Intn(31) + 1
            fmt.Println(era, year, month, day)
        }
        fmt.Println(month,day)  //作用域不再有了。
go build scope-rules.go      
# command-line-arguments
./scope-rules.go:22:14: undefined: month
./scope-rules.go:22:20: undefined: day


包括switch的每个case也是都拥有自己独立的作用域，每个分支里面的day变量在分支结束后，day变量将不再处于作用域之内，switch分支的作用域是唯一一种无需使用大括号标识的作用域。


cat random-date.go
package main import(         "fmt"         "math/rand"         "time" ) var era = "AD" func main(){         rand.Seed(time.Now().Unix())         year := 2018         month := rand.Intn(12) + 1         daysInMonth := 31         switch month {         case 2:             daysInMonth = 28         case 4, 6, 9, 11:             daysInMonth = 30         }         day := rand.Intn(daysInMonth) + 1         fmt.Println(era, year, month, day) }


#./random-date
AD 2018 11 30

#./random-date
AD 2018 11 30


研究下闰年：
cat random-date-study.go
package main import(         "fmt"         "math/rand"         "time" ) var era = "AD" func main(){         rand.Seed(time.Now().Unix())         year := 2018 + rand.Intn(5)         //year := 2000         leep := year%400 == 0 || (year%4 == 0 && year%100 != 0)  //是否是闰年Boole         month := rand.Intn(12) + 1         daysInMonth := 31         switch month {         case 2:             if leep{                daysInMonth = 29             } else {                daysInMonth = 28             }         case 4, 6, 9, 11:             daysInMonth = 30         }         for i := 0;i < 10 ;i++ {           day := rand.Intn(daysInMonth) + 1           fmt.Println(era, year, month, day)         } }

./random-date-study
AD 2000 2 18
AD 2000 2 4
AD 2000 2 6
AD 2000 2 8
AD 2000 2 7
AD 2000 2 21
AD 2000 2 7
AD 2000 2 29
AD 2000 2 12
AD 2000 2 12

下载：
https://golang.google.cn/dl/go1.17.8.linux-amd64.tar.gz
完成之后解压到/usr/local
tar -C /usr/local -xzf go1.17.8.linux-amd64.tar.gz

打开环境变量文件
vi /etc/profile.d/golang.sh
export GOROOT=/usr/local/go
export PATH=$PATH:$GOROOT/bin
export GOPATH=/root/go
export PATH=$PATH:$GOPATH/BIN

刷新环境变量
source /etc/profile.d/golang.sh

一、CentOS Linux release 8.5更换阿里yum源：
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-8.repo mv CentOS-Base.repo  CentOS-Linux-BaseOS.repo sed -i -e 's/failovermethod/#failovermethod/g' /etc/yum.repos.d/CentOS-Linux-BaseOS.repo sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Linux-BaseOS.repo yum makecache
来自：https://blog.csdn.net/alfiy/article/details/121897360

二、Centos8 不在维护，第三方的镜像站中均已移除CentOS 8的源，yum install 会报错建议更换源。
备份旧的：
cd /etc/yum.repos.d/
mv CentOS-Base-aliyun-8.repo CentOS-Base-aliyun-8.repo.bak
mv CentOS-Base.repo CentOS-Base.repo.bak


下载新的：
wget https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo -O /etc/yum.repos.d/Centos-vault-8.5.2111.repo
wget https://mirrors.aliyun.com/repo/epel-archive-8.repo -O /etc/yum.repos.d/epel-archive-8.repo
yum clean all && yum makecache



下载：
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-8.repo
yum install -y epel-release
yum clean all
rpm --rebuilddb
yum update
yum list
yum makecache


来自：https://www.ngui.cc/article/show-390936.html

curl -v -d'1）杰克。
2）杰克\r\n3)杰克东
3）你是谁 "a" "b"
                 [空行的空格全是下划]
4)jack    ' x.xxxx.com

      }elseif("POST" == $method){         print_r(key($_POST));         $textcontents = trim(key($_POST));         $filename=date("Ymd")."pasted_textcontents".date("His").".txt";         $file = fopen("./tmp/".$filename,"w");//打开文件准备写入         fwrite($file,$textcontents);//写入         @chmod($file,0600);         fclose($file);//关闭         die($filename);
来自：https://blog.csdn.net/zhaozhi406/article/details/11131971
https://www.xknote.com/blog/1127037.html

背景：有时你想测试一下传说中的微服务如熔断，服务器的接口超时（尤其是上传姑且叫大文件），这个rpm包应该是有用的。
限速
wondershaper是国外人开发的一款在Linux内核下基于TC工具的对整块网卡的限度工具。

第一种安装方法
首先下载wondershaper的rpm安装包：wondershaper-1.1a-7.noarch.rpm

安装wondershaper：
[root@localhost ~]# rpm -ivh wondershaper-1.1a-7.noarch.rpm


第二种安装方法
由于Centos7第三方库内才有这个软件，先安装第三方库
yum install epel-release -y
yum install wondershaper -y
限速命令：
第一个参数为网卡接口名，后面两个数字分别代表上行和下行的速度（单位Kb）

[root@localhost ~]# wondershaper eth0 5000 500
取消限速：

[root@localhost ~]# wondershaper clear eth0

来自：https://www.shuzhiduo.com/A/LPdo61bg53/

     Alfred是Mac下一个非常强大的工具，网上有许多如何使用的教程，我目前也只是会使用一些基本功能。其中一个我特别喜欢的功能就是直接可以在Alfred里面输入shell命令（默认需要在命令前家>符号，表示是shell命令），然后就会自动打开终端执行。但这里有个问题就是Alfred默认使用Mac自带的Terminal，而大多数在Mac经常使用终端的一般都会使用iTerm2，因为它配合zsh+oh my zsh，真的是非常强大。对于目前最新的iTerm 3.x版本，可以通过如下方法将Alfred内置的Terminal改为iTerm2：

打开Alfred的"Preferences->features->Terminal/shell"，将"Application"选为"custom"，然后将下面的编辑框中的脚本内容替换为下面的
on alfred_script(q)   if application "iTerm2" is running or application "iTerm" is running then     run script "       on run {q}         tell application \":Applications:iTerm.app\"           activate           try             select first window             set onlywindow to true           on error             create window with default profile             select first window             set onlywindow to true           end try           tell the first window             if onlywindow is false then               create tab with default profile             end if             tell current session to write text q           end tell         end tell       end run     " with parameters {q}   else     run script "       on run {q}         tell application \":Applications:iTerm.app\"           activate           try             select first window           on error             create window with default profile             select first window           end try           tell the first window             tell current session to write text q           end tell         end tell       end run     " with parameters {q}   end if end alfred_script

需要注意的是不同的iTerm2版本脚本内容不太一样，该脚本适用于最新的iTerm2版本，即iTerm2 3.0.

实践来自：https://www.cxymm.net/article/qq_29855509/120960802

sudo codesign --force --deep --sign - /Applications/PhotoScapeX.app

修复失败。

https://www.bbsmax.com/A/gAJG2D0zZR/

强制关掉一些进程后，方可使用zsh，发现有一个进程开了太多的进程：
ps -ef|grep UltraSearchSyste|wc -l
    3594
zsh出现 ：fork failed: resource temporarily unavailable，且启动不了程序了。

ps -ef|grep UltraSearchSyste|head -1
    0   105     1   0 四05下午 ??         9:44.65 /var/root/.UltraSearchSystem/UltraSearchSystemDaemon pd

    0 98562   105   0  3:41下午 ??         0:00.00 (UltraSearchSyste)
    0 98569   105   0  9:05下午 ??         0:00.00 (UltraSearchSyste)

开机启动位置，以为它是：
ls ~+/com.UltraSearchSystemDaemon.plist
cat ~+/com.UltraSearchSystemDaemon.plist
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0">   <dict>     <key>Label</key>     <string>com.UltraSearchSystemDaemon</string>     <key>ProgramArguments</key>     <array>       <string>/Library/Application Support/com.UltraSearchSystemDaemon/UltraSearchSystem</string>       <string>r</string>     </array>     <key>RunAtLoad</key>     <true />     <key>StartInterval</key>     <integer>14400</integer>   </dict> </plist>

其实，它不是，是它，符合位置和pd参数：
/Library/LaunchDaemons/com.UltraSearchSystemP.plist
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0">   <dict>     <key>KeepAlive</key>     <true />     <key>Label</key>     <string>com.UltraSearchSystemP</string>     <key>ProgramArguments</key>     <array>       <string>/var/root/.UltraSearchSystem/UltraSearchSystemDaemon</string>       <string>pd</string>     </array>     <key>RunAtLoad</key>     <true />     <key>StandardErrorPath</key>     <string>/dev/null</string>     <key>StandardOutPath</key>     <string>/dev/null</string>   </dict> </plist>
解决开机启动问题：
sudo rm -rf  ~+/com.UltraSearchSystemP.plist
Password:
来自：

如何删除mac上的ultrasearchapp？
https://www.zhihu.com/question/400059869
再次参考：https://www.makeuseof.com/tag/hidden-launchdaemons-launchagents-mac/
来自：https://www.pcrisk.com/removal-guides/18893-ultrasearchsystem-adware-mac

执行命令：sudo su -
source ~/.zshrc
compinit:503: no such file or directory: /usr/local/share/zsh/site-functions/_brew_cask

出现：compinit:503: no such file or directory: /usr/local/share/zsh/site-functions/_brew_cask
解决办法：
vim /usr/local/share/zsh/site-functions/_brew_cask

#compdef brew-cask #autoload # Zsh Autocompletion script for Homebrew Cask #   https://github.com/homebrew/brew # Authors: #   Patrick Stadler (https://github.com/pstadler) #   Josh McKinney (https://github.com/joshka) # only display the main commands (but enable completing aliases like 'ls') zstyle -T ':completion:*:*:*:brew-cask:*' tag-order && \   zstyle ':completion:*:*:*:brew-cask:*' tag-order 'commands' __brew_all_casks() {   local -a list   local expl   local comp_cachename=brew_casks   if ! _retrieve_cache $comp_cachename; then     list=( $(brew search --cask) )     _store_cache $comp_cachename list   fi   _wanted list expl 'all casks' compadd -a list } __brew_installed_casks() {   local -a list   local expl   list=( $(brew list --cask) )   _wanted list expl 'installed casks' compadd -a list } __brew_cask_commands() {   local -a commands   commands=(     'audit:verifies installability of Casks'     'cat:dump raw source of the given Cask to the standard output'     'create:creates the given Cask and opens it in an editor'     'doctor:checks for configuration issues'     'edit:edits the given Cask'     'fetch:downloads remote application files to local cache'     'home:opens the homepage of the given Cask'     'info:displays information about the given Cask'     'install:installs the given Cask'     'list:with no args, lists installed Casks; given installed Casks, lists staged files'     'outdated:list the outdated installed Casks'     'reinstall:reinstalls the given Cask'     'style:checks Cask style using RuboCop'     'uninstall:uninstalls the given Cask'     'upgrade:upgrade installed Casks with newer versions'     'zap:zaps all files associated with the given Cask'   )   _describe -t commands "brew cask command" commands } __brew_cask_aliases() {   local -a aliases   aliases=(     'dr'     'homepage'     'abv'     'ls'     '-S'     'rm'     'remove'   )   _describe -t commands "brew cask command aliases" aliases } __brew_cask_command() {   local command="$1"   local completion_func="_brew_cask_${command//-/_}"   declare -f "$completion_func" >/dev/null && "$completion_func" && return } _brew_cask_abv() {   _brew_cask_info } _brew_cask_audit() {   __brew_all_casks } _brew_cask_cat() {   __brew_all_casks } _brew_cask_create() {   _arguments '*::token:' } _brew_cask_edit() {   __brew_all_casks } _brew_cask_fetch() {   _arguments : \     '--force:force re-download even if the files are already cached' \     '*::token:__brew_all_casks' } _brew_cask_home() {   __brew_all_casks } _brew_cask_homepage() {   __brew_cask_home } _brew_cask_info() {   __brew_all_casks } _brew_cask_install() {   _arguments : \     '--force:re-install even if the Cask appears to be already present' \     '--skip-cask-deps:skip any Cask dependencies' \     '--require-sha:abort installation if the Cask does not have a checksum defined' \     '*::token:__brew_all_casks' } _brew_cask_list() {   _arguments : \     '-1[format output in a single column]' \     '-l[format as detailed list]' \     '*::token:__brew_installed_casks' } _brew_cask_outdated() {   _arguments : \     '--greedy:also list Casks with auto_updates or version \:latest' \     '*::token:__brew_installed_casks' } _brew_cask_remove() {   _brew_cask_uninstall } _brew_cask_rm() {   _brew_cask_uninstall } _brew_cask_style() {   _arguments : \     '--fix:auto-correct any style errors if possible' \     '*::token:__brew_all_casks' } _brew_cask_uninstall() {   _arguments : \     '--force:uninstall even if the Cask does not appear to be present' \     '*::token:__brew_installed_casks' } _brew_cask_upgrade() {   _arguments : \     '--force:upgrade even if Cask is not present, and --force the install' \     '--greedy:also upgrade Casks with auto_updates or version \:latest' \     '*::token:__brew_installed_casks' } _brew_cask_zap() {   __brew_all_casks } _brew_cask() {   local curcontext="$curcontext" state state_descr line   typeset -A opt_args   _arguments -C : \     '--verbose:Give additional feedback during installation.' \     '--appdir=-:Target location for Applications. The default value is /Applications:' \     '--colorpickerdir=-:Target location for Color Pickers. The default value is ~/Library/ColorPickers.' \     '--prefpanedir=-:Target location for Preference Panes. The default value is ~/Library/PreferencePanes.' \     '--qlplugindir=-:Target location for QuickLook Plugins. The default value is ~/Library/QuickLook.' \     '--dictionarydir=-:Target location for Dictionaries. The default value is ~/Library/Dictionaries.' \     '--fontdir=-:Target location for Fonts. The default value is ~/Library/Fonts.' \     '--servicedir=-:Target location for Services. The default value is ~/Library/Services.' \     '--input_methoddir=-:Target location for Input Methods. The default value is ~/Library/Input Methods.' \     '--internet_plugindir=-:Target location for Internet Plugins. The default value is ~/Library/Internet Plug-Ins.' \     '--audio_unit_plugindir=-:Target location for Audio Unit Plugins. The default value is ~/Library/Audio/Plug-Ins/Components.' \     '--vst_plugindir=-:Target location for VST Plugins. The default value is ~/Library/Audio/Plug-Ins/VST.' \     '--vst3_plugindir=-:Target location for VST3 Plugins. The default value is ~/Library/Audio/Plug-Ins/VST3.' \     '--screen_saverdir=-:Target location for Screen Savers. The default value is ~/Library/Screen Savers.' \     '--no-binaries:Do not link "helper" executables to /usr/local/bin.' \     '--debug:Output debugging information of use to Cask authors and developers.' \     ':command:->command' \     '*::options:->options'   case "$state" in   (command)     _alternative -C 'brew-cask' \       'aliases:alias:__brew_cask_aliases' \       'commands:command:__brew_cask_commands' ;;   (options)     __brew_cask_command "$line[1]" ;;   esac } _brew_cask "$@"

来自：https://blog.csdn.net/shentian885/article/details/115902464