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I need the command to find all the 2 letter commands like rm, ls, cp, mv in all the diectories that ends with 'bin'.

I have found those directories using the command
ls -alR / 2>/dev/null | grep '^d' | gerp 'bin$'

Please help.
Posted 22-Nov-12 19:13pm
Updated 23-Nov-12 2:19am
Sorry, I feel that this is not quite a topic adequate to the site devoted to software development. Manipulations with bash commands, even tricky, is not quite programming... this is still user's level...
srmohanr 23-Nov-12 2:10am
Please tell me whether
find / -type f -name "??" | grep '/*bin/' 2>/dev/null, will work correctly
Richard MacCutchan 23-Nov-12 6:43am
Why don't you try it for yourself?
srmohanr 23-Nov-12 7:47am
I am not having terminals with me. Please help
Richard MacCutchan 23-Nov-12 7:57am
Neither am I. If you don't have access to a Unix/Linux system then why do you need this command?
srmohanr 23-Nov-12 8:05am
this for my college assignment.
Richard MacCutchan 23-Nov-12 8:19am
In that case your teacher will be expecting you to do the work for yourself by reading your study guides and notes.
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Solution 2

We are developers, after all (error handling left to the reader):

/* finds recursively files having 2-letters name in directories whoose name ends with 'bin'
    rd [<DIRNAME>]
  on <DIRNAME> missing, current directory is used
#include <string.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <dirent.h>
#define BUFSIZE 0x400
int has_slash(const char * buf, size_t len);
int rd(const char * nam, int check)
  char buf[BUFSIZE];
  DIR * d = opendir(nam);
  if (d)
    struct dirent *entry;
    while   ((entry = readdir(d)) != NULL)
      if ( check && entry->d_type == DT_REG )
        if (strlen(entry->d_name)==2)
          printf("%s/%s\n", nam, entry->d_name);
      if (entry->d_type == DT_DIR)
        int check;
        int len;
        strcpy( buf, nam );
        if ( ! has_slash(nam, strlen(nam)))
          strcat(buf, "/");
        strcat(buf, entry->d_name);
        len = strlen(entry->d_name);
        check =  ! strncmp( &entry->d_name[len-3], "bin", 3);
        if ( strcmp(".", entry->d_name) && strcmp("..", entry->d_name))
          rd(buf, check);
  return 0;
int has_slash(const char * buf, size_t len)
  if ( len < 1) return 0;
  if ( buf[len-1] == '/' ) return 1;
  return 0;
int is_bin(const char * buf, size_t len)
  if ( has_slash( buf, len) )
  if ( len < 3)
    return 0;
  else if ( len == 3 )
    if ( ! strncmp(buf, "bin",3))
      return 1;
    if ( !strncmp(&buf[len-4], "/bin", 4))
      return 1;
  return 0;
int main (int argc, char * argv[])
  char buf[BUFSIZE];
  if (argc > 1)
    strncpy(buf, argv[1], BUFSIZE-1);
    buf[BUFSIZE-1] = '\0';
    getcwd(buf, sizeof(buf));
  rd( buf, is_bin(buf, strlen(buf)));
  return 0;

output example:
$ ./rd /

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Solution 1

You already asked this question here[^] and I gave you a suggestion to get started. Have you looked at the find command and read the man pages for it? How about grep and awk?

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