for item in *.json; do # grep "perl" "$item" > /dev/null #为了不在屏幕上显示grep结果 # 或者: grep -q "perl" "$item" if [ $? -eq 0 ]; then #如果搜索到perl,则$?会是0,否则为1 echo $item #输出含有perl的文件,对应的文件名 fi done 标签: BASH , grep 好文要顶 关注我 ...
In addition to the applet, there are a few tools that you can use to query and control NetworkManager from your shell. For a very quick summary of your current connection status, use the nm-tool command with no arguments. You’ll get a list of interfaces and configuration parameters. In ...
Linux version 6.1.21-v8+ (dom@buildbot) (aarch64-linux-gnu-gcc-8 (Ubuntu/Linaro 8.4.0-3ubuntu1) 8.4.0, GNU ld (GNU BinutilsforUbuntu) 2.34)#1642 SMP PREEMPT Mon Apr 3 17:24:16 BST 2023 $cat/etc/issue $ more /etc/issue $ less /etc/issue demos grep ®ular expression/ 正则...
As you can see, the file command is an important one to know and one which you're sure to use throughout your career. [ Readers also liked: Linux package management with YUM and RPM ] Finding the package The nslookup command is one that you use frequently but it isn't installed on ...
To use a time zone other than the system default for just one shell session, set the TZ environment variable to the name of a file in /usr/share/ zoneinfo and test the change, like this: 要在仅对一个shell会话使用非系统默认时区,请将TZ环境变量设置为/usr/share/zoneinfo中的文件名,并测试...
Do we still need to preallocate some amount of memory for use as (transparent) hugepages? How can I see the number of transparent hugepages that are actually in use on the system (either globally or by individual processes)? How do I enable HugePages on Red Hat Enterprise Linux?
When developing applications based onDocker, being able to find specific information in the logs and save this data to file can speed up the troubleshooting and debugging process. Here are some tips on using log options, tail and grep to find what you are looking for in docker containers’ ...
This is not intended as a complete solution nor as a recommendation to use on production instances. As this involves security concerns, the administrator should work in conjunction with their security team to understand the best solution available to their company. To record all commands entered int...
2.2 Use Shell(使用 Shell) When you install Linux, you should create at least one regular user in addition to the root user; this will be your personal account. For this chapter, you should log in as the regular user. 安装Linux 时,除了 root 用户外,还应创建至少一个普通用户,这就是 你的...
The sort command is used in Linux to print the output of a file in given order. This command processes on your data (the content of the file or output of...