The OS version of a Linux distribution can be determined by using the command-line interface as well...Command Example uname -a $uname -a Linux ip-10-0-0-224 5.4.0-1045-aws#47-Ubuntu SMP Tue Apr 13 07:02...:25 UTC2021 x86_64 x86_64 x86_64 GNU/Linux more /proc/version $ mor...
When writing Shell scripts, you may find yourself in a situation where you need to perform an action based on whether a file exists or not. In Bash, you can use the test command to check whether a file exists and determine the type of the file....
You can use the find command and other options as follows. The -s option to the test builtin check to see if FILE exists and has a size greater than zero. It returns true and false values to indicate that file is empty or has some data. This page shows how to check if a file is...
shell $> cat check_memcache.py #!.../usr/bin/python import memcache import getopt import sys def usage(): print """check_memcache is.../check_memcache 3.修改客户端 nrpe shell $> vim /etc/nagios/nrpe.cfg command[check_memcache]=/usr/lib/nagios...eric_1,eric_2,eric_3 service_descr...
{ "m_Item1": { "JobId": 9299, "ResIds": [ 141 ], "TaskId": 170355 }, "m_Item2": { "affinity": [ 1 ], "commandLine": "echo specialword1", "environmentVariables": { "CCP_CLUSTER_NAME": "LN11-RH71-HN1", "CCP_COREIDS": "0", "CCP_EXCLUSIVE": "False", "CCP_ISADM...
if [ condition ] then command1 command2 ... else command3 command4 ... fi 例如,以下代码判断当前目录下是否存在一个名为file.txt的文件: # 判断当前目录下是否存在一个名为file.txt的文件,图方便写成一行。 if [ -f file.txt ]; then echo "file.txt exists."; else echo "file.txt does not...
Many commands operate as cat does; if you don’t specify an input file, the command reads from stdin. Output is a little different. Some commands (like cat) send output only to stdout, but others have the option to send output directly to files. 标准输入和输出通常缩写为stdin和stdout。
#Take the filename from the command-line argument filename=$1 #Check whether the argument is missing or not if["$filename"!=""];then #Check whether the file exists or not using the -f operator if[[-f"$filename"]];then echo"File exists." ...
The touch command is used to create a new empty file instantly. This is useful when you need an empty file to populate with data later.The basic syntax of touch is:touch [options] filenameSome useful options for touch include:-c –Do not create the file if it already exists. This ...
After you change your protected or public settings, run the same command to deploy them to the VM. If any settings changed, the updates are sent to the extension. LAD reloads the configuration and restarts itself. Migrate from previous versions of the extension ...