cat 没有 -n
user@linux:~$ cat /etc/sysctl.conf | head -4
#
# /etc/sysctl.conf - Configuration file for setting system variables
# See /etc/sysctl.d/ for additional system variables.
# See sysctl.conf (5) for information.
user@linux:~$
在-n命令中有cat选项来显示文件的行号。
user@linux:~$ cat -n /etc/sysctl.conf | head
我已经运行了命令: gem install bcrypt '3.1.7‘。
不幸的是,gem无法安装。相反,我得到了以下输出:
Fetching: bcrypt-3.1.7.gem (100%)
Building native extensions. This could take a while...
ERROR: Error installing bcrypt-ruby:
ERROR: Failed to build gem native extension.
/usr/local/rvm/rubies/ruby-1.8.7-head/bin/rub
基本上,当我尝试在main中初始化它时,我从valgrind得到以下代码
==4262== at 0x109730: main (in /home/raf/os/domaci4/main)
==4262== Address 0x544c210 is 0 bytes after a block of size 464 alloc'd
==4262== at 0x4C2FB0F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==4262== by 0x1096D3: main (in /
我想我可以概括的特性实现,并准备了一个补丁。
但是,我的代码在出现奇怪的错误消息时失败了:
rustc: x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcollections
/home/nodakai/prog/rust-HEAD/src/libcollections/str.rs:140:17: 140:25 error: `Slice` is not a trait
/home/nodakai/prog/rust-HEAD/src/libcollections/str.
我不知道该如何用这个发行版安装应用程序:
$ cat /proc/version
Linux version 3.10.0-714.10.2.lve1.5.19.3.el7.x86_64 (mockbuild@buildfarm02.cloudlinux.com) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC) ) #1 SMP Tue Aug 7 21:33:29 EDT 2018
yum,apt-get,rpm,都说是command not found
编辑:
$ whereis rpm
rpm: /usr/lib/rpm /etc
void *insert_rear_node(void *arg)
{
int *argument=(int *)arg;
int value=*argument;
//Assume that allocation is happening fine (Just like malloc , it is a custom heap allocator)
struct Node *head=(struct Node *) RTallocate(RTpointers, sizeof(struct Node));
struct Node *temp;
setf_init
我无法在函数read.table()中为row.names指定正确的参数
下面是简单的文本:
name sex age height
1 x1 F 18 162
2 x2 M 19 170
3 x3 M 21 178
4 x4 F 22 166
5 x5 F 23 165
当我读到:
data1=read.table('test',head=T,sep='',row.n
我在Linux中遇到了以下代码(include/linux/list.h)。我对713行感到困惑。特别是,我不明白({ n=pos->mem.next;1;})。
大括号的作用是什么?为什么这条语句中有一个“1”?
如果有人能解释一下这一行,我将不胜感激。注意,我不需要解释链接表和#定义是如何工作的,等等。
704 /**
705 * hlist_for_each_entry_safe - iterate over list of given type safe against removal of list entry
706 * @pos: the type * t
我有以下配置:
git version 1.8.5.6
GNU bash, version 4.2.25(1)-release (x86_64-pc-linux-gnu)
我给zgit_info_update打了电话,还试着提交。但是,当我在Travis ()中运行Bash时,我仍然遇到了一些问题。
我该怎么做呢?
在这里,输出:
git version 1.8.5.6
GNU bash, version 4.2.25(1)-release (x86_64-pc-linux-gnu)
Copyright (C) 2011 Free Software Foundation, Inc.
Licen
我想打电话给hlist_nulls_add_head_rcu来管理我的列表,但是gcc给出了很多错误信息如下:
|| ./include/linux/rculist_nulls.h: In function ‘hlist_nulls_add_head_rcu’:
/home/river/Desktop/kernel/linux-4.9.82/./include/linux/compiler.h|518 col 38| error: call to ‘__compiletime_assert_97’ declared with attribute error: Need native word
(* function for union of two ordered sets*)
let rec search n list1 = match list1 with
[] -> false
| head :: tail when head = n -> true
| head :: tail when head != n -> search n tail
;;
(* function calls and output *)
Printf.printf("\nList = {");;
open Printf
let list1=[