root@iZ94uwewwwnZ:/# cat /etc/crontab# /etc/crontab: system-wide crontab# Unlike any other crontab you don't have to run the `crontab'# command to install the new version when you edit this file# and files in /etc/cron.d. These files also have username fields,# that none of the...
/bin/bash command_name="ls" if type -d "$command_name" &> /dev/null; then type -d "$command_name" else echo "Command '$command_name' not found." fi 这个脚本会检查ls命令的类型,并打印出来。如果命令不存在,则会打印一条错误消息。
方法一:环境变量法 熟悉linux的都知道,大部分发行版都会判断用户目录下是否有bin目录,如果有就会将这个目录加入环境变量,也就是说,我们可以将一些脚本写好放到这个目录下,也就是$HOME/bin目录下,这样我们就可以在终端直接调用脚本了,上述判断bin目录是否存在的部分一般会放在$HOME/.profile,我的系统下这部分内容如下:...
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Linux provideslspcicommand in order to list PCI bus and devices information. This command will provide brief or detailed information about currently connected PCI devices like GPU, USB Card etc. Linux提供lspci命令以列出PCI总线和设备信息。 该命令将提供有关当前连接的PCI设备(如GPU,USB卡等)的简要或详...
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME 1. 输出列说明: COMMAND:进程的名称 PID:进程标识符 PPID:父进程标识符(需要指定-R参数) USER:进程所有者 FD:文件描述符,应用程序通过文件描述符识别该文件。 TYPE:文件类型 DEVICE:指定磁盘的名称 ...
crond service is not listed in /etc/init.d/ or in the "chkconfig --list" command. /etc/cron.daily, /etc/cron.weekly and /etc/cron.daily are present. When executing "crontab -e" reports, command not found.Environment Red Hat Enterprise Linux 4 Red Hat Enterprise Linux 5 Red Hat Ente...
When trying to create a new profile in Raw # cat /etc/dconf/db/local.d/03-displaybuttons [/org/gnome/shell/overrides] button-layout=':minimize,maximize,close' The "dconf update" command gives following error : Raw # dconf update ...
The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. Si votre réseau est en ligne, assurez-vous de bien comprendre l’incidence poss...
[root@mysql#] gdb --batch --pid `pidof mysqld` --ex 'call malloc_trim(0)' PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 45305 mysql 20 0 28.4g 5.2g 8288 S 2.7 17.0 64:56.82 mysqld 这就像是在InnoDB表中产生太多碎片后,主动执行OPTIMIZE TABLE重建表的做法。 为了验证这一...