found 如何解决 Linux 中的 string was not found 问题? (linux string was not)

How to Solve “String was not Found” Problem in Linux?

When working with Linux, it is common to encounter errors and issues that can hinder your productivity. One such problem is the “string was not found” error, which can occur when executing commands or searching for files. This error message indicates that the system cannot find the specified string or file, causing frustration and confusion for users.

So, how can you solve the “string was not found” problem in Linux? In this article, we will discuss some of the common causes and solutions for this error.

Cause 1: Typing Error

One of the most common causes of the “string was not found” error is a typing mistake. Linux is case-sensitive, meaning that even a all typo in a command or file name can cause an error. Therefore, it is important to check the spelling and capitalization of your commands and file names before running them.

Solution: Verify the Spelling and Capitalization

To avoid typos, you can use the auto-complete feature by pressing the Tab key after typing the first few characters of a command or file name. This will automatically complete the rest of the word, saving you time and reducing the likelihood of making spelling errors.

Cause 2: Missing Packages

Another reason for the “string was not found” error is missing or incomplete packages that are required to execute the command. Linux applications often depend on other packages to function correctly, and if any of these packages are missing, the command or file will not be found.

Solution: Install the Required Packages

To resolve this issue, you need to identify the missing packages and install them. You can do this by using the package manager of your Linux distribution. For example, if you are using Ubuntu, you can use the following command to search for packages:

$ sudo apt search package-name

Once you have identified the required package, you can install it using the following command:

$ sudo apt install package-name

Cause 3: Path Not Set or Incorrect

The “string was not found” error can also occur when the system cannot locate the file or command because the path is not set or incorrect. Linux mntns a list of directories called the PATH, which contns the locations where the system searches for executable files. If the file or command you are looking for is not located in any of these directories, you will get the “string was not found” error.

Solution: Check and Set the PATH Variable

To check the PATH environment variable, you can use the following command:

$ echo $PATH

This will display a list of directories separated by a colon, and you can check if the directory contning the file or command you are trying to access is included. If it is not, you can add the directory to the PATH variable by editing the .bashrc or .profile file in your home directory.

For example, if you want to add the directory /usr/local/bin to the PATH variable, you can add this line to your .bashrc or .profile file:

export PATH=$PATH:/usr/local/bin

After saving the file and reopening the terminal, the new PATH variable will be loaded, and you can try running the command or file agn.

Conclusion

The “string was not found” error can be frustrating, but it is usually caused by a simple mistake that can be easily fixed. By checking the spelling and capitalization of your commands and file names, installing missing packages, and setting the PATH variable correctly, you can avoid this error and work more efficiently in your Linux environment.

相关问题拓展阅读:

c语言string的用法大全

C语言是一门面向过程的、抽象化的通用程或孝陪序设计语言,广泛应用于底层开发。C语言能以简易的方式编译、处慎坦理低级存储器。C 语言string的用法有哪些呢,请看看下面我为你整理 总结 的c语言string的用法大全_C语言中string使用 方法 。

c语言string的用法

函数原型:char *strdup(const char *s)

函数功能:字符串拷贝,目的空间由该函数分配

函数返回:指向拷贝后的字符串指针

参数说明:src-待拷贝的源字符串

所属文件:

view plain

#include

#include

#include

intmain()

{

char*dup_str,*string=”abcde”;

dup_str=strdup(string);

printf(“%s”,dup_str);

free(dup_str);

return0;

}

@函数名称:strcpy

函数原型:char* strcpy(char* str1,char* str2);

函数功能:把str2指向的字符串拷贝到str1中去

函数返回:返回str1,即指向str1的指针

参数说明:

所属文件:

view plain

#include

#include

intmain()

{

charstring;

char*str1=”abcdefghi”;

strcpy(string,str1);

printf(“thestringis:%s\n”,string);

return0;

}

@函数名称:strncpy

函数原型:char *strncpy(char *dest, const char *src,intcount)

函数功能:将字符串src中的count个字符拷贝到字符串dest中去

函数返回:指向dest的指针

参数说明:dest-目的字符串,src-源字符串,count-拷贝的字符个数

所属文件:

view plain

#include

#include

intmain()

{

char*src=”bbbbbbbbbbbbbbbbbbbb”;//20’b’s

chardest=”aaaaaaaaaaaaaaaaaaaa”;//20’a’s

puts(dest);

strncpy(dest,src,10);

puts(dest);

return0;

}

输出:

view plain

/*******************************************

aaaaaaaaaaaaaaaaaaaa

bbbbbbbbbbaaaaaaaaaa

*******************************************/

注意:strncpy只复制指定长度的字符,不会自动在末尾加’\0’。若指定长度超过源字符串长度,不够的部分补‘\0’,

@函数名称:strcat

函数原型:char* strcat(char * str1,char * str2);

函数功能:把字符串str2接到衫蠢str1后面,str1最后的’\0’被取消

函数返回:str1

参数说明:

所属文件:

view plain

#include

#include

intmain()

{

charbuffer;

strcpy(buffer,”Hello”);

strcat(buffer,”world”);

printf(“%s\n”,buffer);

return0;

}

@函数名称:strncat

函数原型:char *strncat(char *dest, const char *src, size_t maxlen)

函数功能:将字符串src中前maxlen个字符连接到dest中

函数返回:

参数说明:

所属文件:

view plain

#include

#include

charbuffer;

intmain()

{

strcpy(buffer,”Hello”);

strncat(buffer,”world”,8);

printf(“%s\n”,buffer);

strncat(buffer,”*************”,4);

printf(“%s\n”,buffer);

return0;

}

注意:与strncpy不同的是,strncat会自动在末尾加‘\0’,若指定长度超过源字符串长度,则只复制源字符串长度即停止

@函数名称:strcmp

函数原型:int strcmp(char * str1,char * str2);

函数功能:比较两个字符串str1,str2.

函数返回:str1str2,返回正数.

参数说明:

所属文件:

view plain

#include

#include

intmain()

{

char*buf1=”aaa”,*buf2=”bbb”,*buf3=”ccc”;

intptr;

ptr=strcmp(buf2,buf1);

if(ptr>0)

printf(“buffer2isgreaterthanbuffer1\n”);

else

printf(“buffer2islessthanbuffer1\n”);

ptr=strcmp(buf2,buf3);

if(ptr>0)

printf(“buffer2isgreaterthanbuffer3\n”);

else

printf(“buffer2islessthanbuffer3\n”);

return0;

}

@函数名称:strncmp

函数原型:int strncmp(char *str1,char *str2,int count)

函数功能:对str1和str2中的前count个字符按字典顺序比较

函数返回:小于0:str1str2

参数说明:str1,str2-待比较的字符串,count-比较的长度

所属文件:

view plain

#include

#include

intmain()

{

charstr1=”aabbc”;//

charstr2=”abbcd”;//

//为使测试程序更简练,此处假定了strncmp只返回-1,0,1三个数

charres_info={”};

intres;

//前1个字符比较

res=strncmp(str1,str2,1);

printf(“1:str1%cstr2\n”,res_info);

//前3个字符比较

res=strncmp(str1,str2,3);

printf(“3:str1%cstr2\n”,res_info);

}

输出:

view plain

/****************************************

1:str1=str2

3:str1

view plain

#include

#include

intmain()

{

char*p=”Findallvowels”;

p=strpbrk(p+1,”aeiouAEIOU”);

while(p)

{

printf(“%s\n”,p);

p=strpbrk(p+1,”aeiouAEIOU”);

}

return0;

}

输出:

view plain

/**************************************

indallvowels

allvowels

owels

els

**************************************/

@函数名称:strcspn

函数原型:int strcspn(const char *s1, const char *s2)

函数功能:统计s1中从头开始直到之一个“来自s2中的字符”出现的长度

函数返回:长度

参数说明:

所属文件:

view plain

#include

#include

intmain()

{

printf(“%d\n”,strcspn(“abcbcadef”,”cba”));

printf(“%d\n”,strcspn(“bcadef”,”cba”));

printf(“%d\n”,strcspn(“”,”cba”));

return0;

}

输出:

view plain

/************************

0

3

9

************************/

@函数名称:strspn

函数原型:int strspn(const char *s1, const char *s2)

函数功能:统计s1中从头开始直到之一个“不来自s2中的字符”出现的长度

函数返回:位置指针

参数说明:

所属文件:

view plain

#include

#include

#include

intmain()

{

printf(“%d\n”,strspn(“abcbcadef”,”cba”));

printf(“%d\n”,strspn(“bcadef”,”cba”));

printf(“%d\n”,strspn(“”,”cba”));

return0;

}

输出:

view plain

/************************

6

0

0

************************/

@函数名称:strchr

函数原型:char* strchr(char* str,char ch);

函数功能:找出str指向的字符串中之一次出现字符ch的位置

函数返回:返回指向该位置的指针,如找不到,则返回空指针

参数说明:str-待搜索的字符串,ch-查找的字符

所属文件:

view plain

#include

#include

intmain()

{

char*str=”Thisisastring!”;

charch;

char*p;

while(1)

{

printf(“Pleaseinputachar:”);

ch=getchar();

p=strchr(str,ch);

if(p)

printf(“%cisthe%dcharacterof\”%s\”\n”,ch,(int)(p-str+1),str);

else

printf(“Notfound!\n”);

printf(“PressESCtoquit!\n\n”);

if(27==getch())

break;

fflush(stdin);

}

return0;

}

运行结果:

view plain

/********************************************

Pleaseinputachar:i

iisthe3characterof”Thisisastring!”

PressESCtoquit!

Pleaseinputachar:l

Notfound!

PressESCtoquit!

Pleaseinputachar:s

sisthe4characterof”Thisisastring!”

PressESCtoquit!

**********************************************/

@函数名称:strrchr

函数原型:char *strrchr(const char *s, int c)

函数功能:得到字符串s中最后一个含有c字符的位置指针

函数返回:位置指针

参数说明:

所属文件:

view plain

#include

#include

intmain()

{

charstring;

char*ptr,c=’r’;

strcpy(string,”Thisisastring”);

ptr=strrchr(string,c);

if(ptr)

printf(“Thecharacter%cisatposition:%d”,c,ptr-string);

else

printf(“Thecharacterwasnotfound”);

return0;

}

@函数名称:strstr

函数原型:char* strstr(char* str1,char* str2);

函数功能:找出str2字符串在str1字符串中之一次出现的位置(不包括str2的串结束符)

函数返回:返回该位置的指针,如找不到,返回空指针

参数说明:

所属文件:

view plain

#include

#include

intmain()

{

char*str1=”OpenWatcomC/C++”,*str2=”Watcom”,*ptr;

ptr=strstr(str1,str2);

printf(“Thesubstringis:%s\n”,ptr);

return0;

}

输出:

The substringis:Watcom C/C++

@函数名称:strrev

函数原型:char *strrev(char *s)

函数功能:将字符串中的所有字符颠倒次序排列

函数返回:指向s的指针

参数说明:

所属文件:

view plain

#include

#include

intmain()

{

charforward=”string”;//原文中定义为char*是不对的,指向代码段的指针内容是不可变的

printf(“Beforestrrev():%s”,forward);

strrev(forward);

printf(“Afterstrrev():%s”,forward);

return0;

}

输出:

view plain

/************************************

Beforestrrev():string

Afterstrrev():gnirts

************************************/

@函数名称:strnset

函数原型:char *strnset(char *s, int ch, size_t n)

函数功能:将字符串s中前n个字符设置为ch的值

函数返回:指向s的指针

参数说明:

所属文件:

view plain

#include

#include

intmain()

{

charstring=”aaaaaaaaaaaaaaaaaaaaaaa”;

charletter=’x’;

printf(“stringbeforestrnset:%s\n”,string);

strnset(string,letter,10);

printf(“stringafterstrnset:%s\n”,string);

return0;

}

输出:

view plain

/*************************************************

stringbeforestrnset:aaaaaaaaaaaaaaaaaaaaaaa

stringafterstrnset:xaaaaaaaaaaaaa

*************************************************/

@函数名称:strset

函数原型:char *strset(char *s, int ch)

函数功能:将字符串s中所有字符设置为ch的值

函数返回:指向s的指针

参数说明:

所属文件:

view plain

#include

#include

intmain()

{

charstring=””;

charsymbol=’c’;

printf(“Beforestrset():%s”,string);

strset(string,symbol);

printf(“Afterstrset():%s”,string);

return0;

}

@函数名称:strtok

函数原型:char *strtok(char *s1, const char *s2)

函数功能:分解s1字符串为用特定分隔符分隔的多个字符串(一般用于将英文句分解为单词)

函数返回:字符串s1中首次出现s2中的字符前的子字符串指针

参数说明:s2一般设置为s1中的分隔字符

规定进行子调用时(即分割s1的第二、三及后续子串)之一参数必须是NULL

在每一次匹配成功后,将s1中分割出的子串位置替换为NULL(摘下链中之一个环),因此s1被破坏了

函数会记忆指针位置以供下一次调用

所属文件:

view plain

#include

#include

intmain()

{

char*p;

char*buffer;

char*delims={“.,”};

buffer=strdup(“Findwords,allofthem.”);

printf(“%s\n”,buffer);

p=strtok(buffer,delims);

while(p!=NULL){

printf(“word:%s\n”,p);

p=strtok(NULL,delims);

}

printf(“%s\n”,buffer);

return0;

}//根据测试,可以随时给strtok的之一个参数输入一个新的字符串,开始新字符串的分隔

PS:根据测试,可以随时给strtok的之一个参数输入一个新的字符串,开始新字符串的分隔

@函数名称:strupr

函数原型:char *strupr(char *s)

函数功能:将字符串s中的字符变为大写

函数返回:

参数说明:

所属文件:

view plain

#include

#include

intmain()

{

charstring=”abcdefghijklmnopqrstuvwxyz”,*ptr;//会影响原字符串的内存,用char来声明

ptr=strupr(string);

printf(“%s”,ptr);

return0;

}

@函数名称:strlwr

函数原型:char *strlwr(char *s)

函数功能:将字符串中的字符变为小写字符

函数返回:指向s的指针

参数说明:

所属文件:

view plain

#include

intmain()

{

charstr=”HOWTOSAY”;

printf(“%s”,strlwr(str));

return0;

}

@函数名称:strerror

函数原型:char *strerror(int errnum)

函数功能:得到错误信息的内容信息

函数返回:错误提示信息字符串指针

参数说明:errnum-错误编号

所属文件:

view plain

#include

#include

intmain()

{

char*buffer;

buffer=strerror(errno);

printf(“Error:%s”,buffer);

return0;

}

@函数名称:memcpy

函数原型:void *memcpy(void *dest, const void *src, size_t n)

函数功能:字符串拷贝

函数返回:指向dest的指针

参数说明:src-源字符串,n-拷贝的更大长度

所属文件:,

view plain

#include

#include

intmain()

{

charsrc=”******************************”;

chardest=”abcdefghijlkmnopqrstuvwxyz”;

char*ptr;

printf(“destinationbeforememcpy:%s\n”,dest);

ptr=memcpy(dest,src,strlen(src));

if(ptr)

printf(“destinationaftermemcpy:%s\n”,dest);

else

printf(“memcpyfailed”);

return0;

}

输出:

view plain

/*************************************************************

destinationbeforememcpy:abcdefghijlkmnopqrstuvwxyz

destinationaftermemcpy:******************************456709

**************************************************************/

@函数名称:memccpy

函数原型:void *memccpy(void *dest, const void *src, int c, size_t n)

函数功能:字符串拷贝,到指定长度或遇到指定字符时停止拷贝

函数返回:

参数说明:src-源字符串指针,c-中止拷贝检查字符,n-长度,dest-拷贝底目的字符串指针

所属文件:,

view plain

#include

#include

intmain()

{

char*src=”Thisisthesourcestring”;

chardest;

char*ptr;

ptr=memccpy(dest,src,’c’,strlen(src));

if(ptr)

{

*ptr=’\0′;

printf(“Thecharacterwasfound:%s”,dest);

}

else

printf(“Thecharacterwasn’tfound”);

return0;

}

输出:

view plain

/*****************************************

Thecharacterwasfound:Thisisthesourc

*****************************************/

PS:指定字符被复制到dest中,memccpy返回了dest中指定字符的下一处的地址,返回NULL表示未遇到指定字符

@函数名称:memchr

函数原型:void *memchr(const void *s, int c, size_t n)

函数功能:在字符串中第开始n个字符中寻找某个字符c的位置

函数返回:返回c的位置指针,返回NULL时表示未找到

参数说明:s-要搜索的字符串,c-要寻找的字符,n-指定长度

所属文件:,

view plain

#include

#include

intmain()

{

charstr;

char*ptr;

strcpy(str,”Thisisastring”);

ptr=memchr(str,’r’,strlen(str));

if(ptr)

printf(“Thecharacter’r’isatposition:%d”,ptr-str);

else

printf(“Thecharacterwasnotfound”);

return0;

}

@函数名称:memcmp

函数原型:int memcmp(const void *s1, const void *s2,size_t n)

函数功能:按字典顺序比较两个串s1和s2的前n个字节

函数返回:0分别表示s1s2

参数说明:s1,s2-要比较的字符串,n-比较的长度

所属文件:,

view plain

#include

#include

intmain()

{

char*buf1=”ABCDE123″;

char*buf2=”abcde456″;

intstat;

stat=memcmp(buf1,buf2,5);

printf(“Thestringstoposition5are”);

if(stat)printf(“not”);

printf(“thesame\n”);

return0;

}

@函数名称:memicmp

函数原型:int memicmp(const void *s1, const void *s2, size_t n)

函数功能:按字典顺序、不考虑字母大小写对字符串s1,s2前n个字符比较

函数返回:0分别表示s1s2

参数说明:s1,s2-要比较的字符串,n-比较的长度

所属文件:,

view plain

#include

#include

intmain()

{

char*buf1=”ABCDE123″;

char*buf2=”abcde456″;

intstat;

stat=memicmp(buf1,buf2,5);

printf(“Thestringstoposition5are”);

if(stat)printf(“not”);

printf(“thesame”);

return0;

}

输出:

view plain

/**************************************

Thestringstoposition5arethesame

***************************************/

@函数名称:memmove

函数原型:void *memmove(void *dest, const void *src, size_t n)

函数功能:字符串拷贝

函数返回:指向dest的指针

参数说明:src-源字符串,n-拷贝的更大长度

所属文件:,

view plain

#include

#include

intmain()

{

chardest=”abcdefghijklmnopqrstuvwxyz”;

printf(“destinationpriortomemmove:%s\n”,dest);

memmove(dest+1,dest,35);

printf(“destinationaftermemmove:%s”,dest);

return0;

}

PS:与memcpy不同的是,memmove可以处理目的字符串与源字符串地址空间出现重叠的情况,可保证待复制的内容不被破坏。

@函数名称: memset

函数原型: void *memset(void *s, int c, size_t n)

函数功能: 字符串中的n个字节内容设置为c

函数返回:

参数说明: s-要设置的字符串,c-设置的内容,n-长度

所属文件: ,

view plain

#include

#include

#include

intmain()

{

charbuffer=”Helloworld”;

printf(“Bufferbeforememset:%s/n”,buffer);

memset(buffer,’*’,strlen(buffer)-1);

printf(“Bufferaftermemset:%s”,buffer);

return0;

}

c语言string的用法大全相关 文章 :

★ c语言string的用法

★ c语言的用法

★ Linux C语言字符与字符串处理

★ c语言中strcmp的用法

★ c语言大括号的用法

★ c语言位运算符的用法

★ c语言char的用法

★ c语言中sort的用法详解

★ c语言中int的用法

linux配置源代码包时出现下面错误

“exact error that occured. This usually means GLIB is incorrectly installed”

是不是由于GLIB的版本太低了?查看判御轿你的拆漏软件的readme啊,确认你的系统是否满足所有依赖关掘肆系。

./configure –prefix=/usr/local/ 要像这样的格式。。。

www.bjbfbx.com

”的污水神好敏流量计with-zlib –with-curl –enable-bcmath –with-jpeg-dir –with-png-dir –with-xpm-dir –with-天然气流量计

这是什么意思,请指点./configure –prefix=/usr/local/php/ –with-apxs2=/usr/local/bin/apxs –with-config-file-path=/usr/local/php/lib/游枝 –with-config-file-scan-dir=/usr/local/etc/ –with-zlib –with-curl –enable-bcmath –with-jpeg-dir –with-png-dir –with-xpm-dir –with-freetype-dir –with-gd –with-mhash –enable-mbstring –with-mcrypt –with-libxml-dir –with-iconv-dir –with-pcre-dir –enable-mysqlnd –with-mysql=

关于linux string was not的介绍到此就结束了,不知道你从中找到你需要的信息了吗 ?如果你还想了解更多这方面的信息,记得收藏关注本站。


数据运维技术 » found 如何解决 Linux 中的 string was not found 问题? (linux string was not)