pfigue

Keybase proof

I hereby claim:

• I am pfigue on github.
• I am pfigue (https://keybase.io/pfigue) on keybase.
• I have a public key ASC7-O8ssdK2kWqGAcI0Ysyi2BWzWYSy_iEmBOY1UegLzgo

To claim this, I am signing this object:

pfigue

/*
 * Compile just with `gcc -o cap1 cap1.c`
 */


#include <stdio.h>
#include <stdlib.h>


char *get_cap_name(unsigned short cap_index)

pfigue

// Compile with e.g. `gcc -o /tmp/eatmem /tmp/eatmem.c`

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>

int main(int argc, char **argv)
{
    void *p, *end, *cur;
    size_t megs;

pfigue

--config

-I shows received headers

-L follows links for 30x redirections

--resolve a.b.c:80:1.2.3.4 resolves domain name a.b.c to 1.2.3.4.

pfigue

#include <stdio.h>
#include <time.h>

int main(int argc, char **argv)
{

  int result;
  struct timespec tp;
  clockid_t clk_id;

pfigue

/*
 *
 * Compile with: `gcc -o clock clock.c`
 *
 * [clock(3) - Linux man page](http://linux.die.net/man/3/clock): *The value returned is the CPU time used [by the process] so far[...]*
 * [What’s the correct way to use printf to print a clock_t?](http://stackoverflow.com/questions/1083142/what-s-the-correct-way-to-use-printf-to-print-a-clock-t)
 *
 */

#include <stdio.h>

pfigue

Prevent a package to be upgraded using apt-get upgrade:

apt-mark [hold|unhold] pkg_name

pfigue

Taking groups inside of a line

From a bunch of lines like Conf e2fslibs (1.42.9-3ubuntu1.2 Ubuntu:14.04/trusty-updates [amd64]) [e2fsprogs:amd64 ] I want to get e2fslibs. apt-get upgrade --dry-run gives such kind of lines.

perl -pe 's/^Conf\s(\S+)\s.*$/$1/'

pfigue

List of Docker containers

docker ps  # shows running containers
docker ps --all  # shows all installed containers

SSH into Docker container

docker attach 665b4a1e17b6/image-name

Pulling a docker image from Docker Hub

pfigue

#define _GNU_SOURCE
#define _FILE_OFFSET_BITS 64
#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/resource.h>
 
#define errExit(msg) do { perror(msg); exit(EXIT_FAILURE); \
 } while (0)