shell script error [: :需要整数表达式 shell script error [: -eq:需要一元表达式 shell script error [: ==:需要一元表达式#!/usr/bin/env bash if [[ $(command -v nvm) == nvm ]]; then echo "❌ nvm not exist, trying to re-install it ... ⏳" else echo "nvm had been installed...
Description: Debian GNU/Linux 11 (bullseye) Release: 11 Codename: bullseye $cat/proc/version 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...
When the function in the shared library runs, it acts according to a set of rules (found in /etc/nsswitch.conf) to determine a plan of action on lookups. For example, the rules usually say that even before going to DNS, check for a manual override in the /etc/hosts file. When the...
The shell creates file if it does not already exist. If file exists, the shell erases (clobbers) the original file first. (Some shells have parameters that prevent clobbering. For example, enter set -C to avoid clobbering in bash.) 如果文件不存在,shell会创建该文件。 如果文件已经存在,shell...
In this post, we will learn how to debug a bash shell script in linux.Using bash command line options like -n, -v and -x we can do the debugging.
Let's access a shell prompt in both types. Boot your Linux system. You will get a text-based login prompt if the system does not include a desktop environment. The following image shows this login prompt on an Ubuntu system. To log in, type your username and password. If the username ...
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Theusermodcommand is used for modifying a user’s account details, stored in the/etc/passwdfile and the-sor--shelloption is used to change the user’s login shell. In this example, we’ll first check user tecmint’s account information to view his default login shell and then change its...
Now, let’s check again what the $SHELL environment variable says: echo $SHELL 1. The first time we use echo $SHELL, we’re in the bash shell. The environment variable holds the path to the bash executable, /bin/bash...
or use a shell script that installs the client remotely. Configuration Manager does not support the use of client push installation for Linux or UNIX servers. Optionally you can configure a Runbook for System Center 2012 Orchestrator to automate the install of the client on the Linux or UNIX ...