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
嗨,我正在学习如何使用eBPF地图,所以我试着运行我在密件抄送文档上找到的简单代码。
import os
import socket
import time
import logging
import signal
import sys
import zmq
import json
import yaml
import netifaces as ni
from bcc import BPF
from ctypes import *
b = BPF(src_file="tailcall_test.c")
tail_fn = b.load_func("tail_call&
我正在寻找一种方法来实现grep --一条行的最后一次出现,例如运行
$grep "!" ibrav8_c11mc12/*
返回:
ibrav8_c11mc12/MgO.scf.a=0.090.ecut=80.k=4.out:! total energy = -608.35146103 Ry
ibrav8_c11mc12/MgO.scf.a=0.090.ecut=80.k=4.out:! total energy = -608.35234197 Ry
ibrav8_c11mc12/MgO.scf.a=
我正在试验一个shell脚本,它应该在同一级别上为多个存储库运行git命令。这个项目结构可能是个坏主意,但这是另一个故事。
在我遇到这个问题之前,一切都很好:
DETAIL="test test" && command="commit -m '${DETAIL}'" && echo $(git ${command})
# -> error: pathspec 'test'' did not match any file(s) known to git.
我也尝试过其他机会,比如
DET
每当我尝试执行sudo apt upgrade时,都会得到以下内容:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
2 not fully installed or removed.
Need to get 0 B/8978 kB of archives.
After t
我正在使用Symfony 4的Doctrine ODM包。试图对文档使用XML映射格式,并得到以下错误:
No mapping file found named 'Post.mongodb.xml' for class 'App\Document\Post'.
我的doctrine_mongodb.yaml文件:
doctrine_mongodb:
auto_generate_proxy_classes: '%kernel.debug%'
auto_generate_hydrator_classes: '%kernel.d