shell

How to execute Python inline from a bash shell

由 核能气质少年 提交于 2021-02-04 09:41:09
问题 Is there a Python argument to execute code from the shell without starting up an interactive interpreter or reading from a file? Something similar to: perl -e 'print "Hi"' 回答1: This works: python -c 'print("Hi")' Hi From the manual, man python : -c command Specify the command to execute (see next section). This termi- nates the option list (following options are passed as arguments to the command). 回答2: Another way is to you use bash redirection: python <<< 'print "Hi"' And this works also

History command works in a terminal, but doesn't when written as a bash script

由 帅比萌擦擦* 提交于 2021-02-04 06:07:00
问题 I have a simple one-liner that works perfectly in the terminal: history | sort -k2 | uniq -c --skip-fields=1 | sort -r -g | head What it does: Gives out the 10 most frequently used commands by the user recently. (Don't ask me why I would want to achieve such a thing) I fire up an editor and type the same with a #!/bin/bash in the beginning: #!/bin/bash history | sort -k2 | uniq -c --skip-fields=1 | sort -r -g | head And say I save it as script.sh . Then when I go to the same terminal, type

History command works in a terminal, but doesn't when written as a bash script

由 ε祈祈猫儿з 提交于 2021-02-04 06:04:52
问题 I have a simple one-liner that works perfectly in the terminal: history | sort -k2 | uniq -c --skip-fields=1 | sort -r -g | head What it does: Gives out the 10 most frequently used commands by the user recently. (Don't ask me why I would want to achieve such a thing) I fire up an editor and type the same with a #!/bin/bash in the beginning: #!/bin/bash history | sort -k2 | uniq -c --skip-fields=1 | sort -r -g | head And say I save it as script.sh . Then when I go to the same terminal, type

History command works in a terminal, but doesn't when written as a bash script

由 。_饼干妹妹 提交于 2021-02-04 06:04:33
问题 I have a simple one-liner that works perfectly in the terminal: history | sort -k2 | uniq -c --skip-fields=1 | sort -r -g | head What it does: Gives out the 10 most frequently used commands by the user recently. (Don't ask me why I would want to achieve such a thing) I fire up an editor and type the same with a #!/bin/bash in the beginning: #!/bin/bash history | sort -k2 | uniq -c --skip-fields=1 | sort -r -g | head And say I save it as script.sh . Then when I go to the same terminal, type

How to parse json response in the shell script?

由 给你一囗甜甜゛ 提交于 2021-02-04 04:57:13
问题 I am working with bash shell script. I need to execute an URL using shell script and then parse the json data coming from it. This is my URL - http://localhost:8080/test_beat and the responses I can get after hitting the URL will be from either these two - {"error": "error_message"} {"success": "success_message"} Below is my shell script which executes the URL using wget. #!/bin/bash DATA=$(wget -O - -q -t 1 http://localhost:8080/test_beat) #grep $DATA for error and success key Now I am not

How to parse json response in the shell script?

由 放肆的年华 提交于 2021-02-04 04:56:43
问题 I am working with bash shell script. I need to execute an URL using shell script and then parse the json data coming from it. This is my URL - http://localhost:8080/test_beat and the responses I can get after hitting the URL will be from either these two - {"error": "error_message"} {"success": "success_message"} Below is my shell script which executes the URL using wget. #!/bin/bash DATA=$(wget -O - -q -t 1 http://localhost:8080/test_beat) #grep $DATA for error and success key Now I am not

shell脚本实例

由 江枫思渺然 提交于 2021-02-03 07:20:34
1. 写一个脚本，利用循环计算10的阶乘 #!/bin/sh factorial=1 for a in `seq 1 10` do factorial=`expr $factorial \* $a` done echo "10! = $factorial" 注：上面有一行，for a in `seq 1 10`,其中seq 1 10 , 即列出现1到10之间所有的数字，这一行也可改为：for a in "1 2 3 4 5 6 7 8 9 10" 2. 写一个脚本，执行后，打印一行提示“Please input a number:"，要求用户输入数值，然 后打印出该数值，然后再次要求用户输入数值。直到用户输入 "end"停止。 #!/bin/sh unset var while [ "$var" != "end" ] do echo -n "please input a number: " read var if [ "$var" = "end" ] then break fi echo "var is $var" done 3. 写一个脚本，利用循环和continue关键字，计算100以内能被3整除的数之和 #!/bin/sh sum=0 for a in `seq 1 100` do if [ `expr $a % 3` -ne 0 ] then continue fi

shell study

由 ≡放荡痞女 提交于 2021-01-31 08:31:47
1. #!/bin/bash 2. ~/.bashrc, ~/.bash_profile 3. sh -n *.sh 测试shell脚本是否存在语法错误 4. sh -x *.sh(或者set -x) 进入跟踪方式，显示所执行的每一条命令，调试 5. set -x 开启调试, set +x 关闭调试 6. echo $? 返回值 7. echo -e 使显示的字符串中转义字符生效 8. read var / read -p "xxx" var 输入 9. myVar=${var:-"varvalue"} 变量var为空,则myVar="varvalue" 10. login shell(/etc/profile, ~/.bash_profile或~/.bash_login或~/.profile) / non-login shell(不会读配置,需要执行source生效) 11. ~/.bashrc non-login shell仅会读取.bashrc配置 12. $(), ` ` ==>在中间为子shell的起始与结束 13. ${} ==>在中间为命令区块的组合 14. ./*.sh ==>在子bash中执行shell脚本; source *.sh ==>在父bash中执行shell脚本 15. test指令; 如 test -e /usr/include/syslog.h &&

How to get the method signatures for DShellFolderViewEvents

由 自闭症网瘾萝莉.ら 提交于 2021-01-29 21:56:09
问题 I'm trying to sink DShellFolderViewEvents using the ATL, and the only method I've been able to successfully subscribe to is DISPID_SELECTIONCHANGED . There appear to be many other events listed in the header shdispid.h , but I can't get them to fire. Not sure what I'm doing wrong (it might be ATL-related), but I thought perhaps I'm implementing event-handler functions with the wrong signatures (currently I'm just trying void functions with no arguments). The problem is that there doesn't

Get comment tag from XML attribute with Bash

由 纵然是瞬间 提交于 2021-01-29 18:48:58
问题 I understand how to retrieve XML content within regular nodes, but I would like to understand how to retrieve content within a comment tag in XML using Bash. For example, consider the below XML snippet: <ParentTag1><!--This comment is associated to ParentTag1 --> <ChildTag1>ChildTag1Blah</ChildTag1><!-- ChildTag1 comment--> <ChildTag2><!-- ChildTag2 comment --> <GrandchildTag1>GrandchildTag1Blah</GrandchildTag1><!-- GrandchildTag1 comment--> <GrandchildTag2>GrandchildTag2Blah</GrandchildTag2>
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