sh

问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: how to use ssh to run shell script on a remote machine? I am trying to make a bash script that runs on my remote server's daily cron jobs to automatically login through ssh to another unix box, run a few commands and then leave. #!/bin/bash ssh machinehost.com -l admin -p 2222 "/usr/bin/find /share/Public/backups/set0 -mtime +14 | xargs rm -f; /usr/bin/find /share/Public/backups/set1 -mtime +4 | xargs rm -f;

问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: how to use ssh to run shell script on a remote machine? I am trying to make a bash script that runs on my remote server's daily cron jobs to automatically login through ssh to another unix box, run a few commands and then leave. #!/bin/bash ssh machinehost.com -l admin -p 2222 "/usr/bin/find /share/Public/backups/set0 -mtime +14 | xargs rm -f; /usr/bin/find /share/Public/backups/set1 -mtime +4 | xargs rm -f;

问题 I am trying to execute a command in a conditional in a makefile. I got it working in a shell: if [ -z "$(ls -A mydir)" ]; then \ echo "empty dir"; \ else \ echo "non-empty dir"; \ fi but if I try it in a makefile, "$(ls -A mydir)" expands to nothing whatever if asdf is empty or not: all: if [ -z "$(ls -A mydir)" ]; then \ echo "empty dir"; \ else \ echo "non-empty dir"; \ fi The ls command does not expand as I expect: $ mkdir mydir $ make if [ -z "" ]; then \ echo "empty dir"; \ else \ echo

问题 This question already has answers here : Difference between sh and bash (11 answers) Closed last year . I have a file to be sourced in Centos 7. It just works fine if I do : $ source set_puregev_env however, if I put this in a shell script, it doesn't work.. $ sh xRUN xRUN: line 3: source: set_puregev_env: file not found this is my shell script : xRUN #!/bin/bash source set_puregev_env can anyone tell me what I might be doing wrong, or missing? 回答1: source is a command implemented in bash,

问题 Suppose I have a #!/bin/sh script which can take a variety of positional parameters, some of which may include spaces, either/both kinds of quotes, etc. I want to iterate "$@" and for each argument either process it immediately somehow, or save it for later. At the end of the script I want to launch (perhaps exec ) another process, passing in some of these parameters with all special characters intact. If I were doing no processing on the parameters, othercmd "$@" would work fine, but I need

问题 I need the ability to run a PHP script 20 times a day at completely random times. I also want it to run only between 9am - 11pm. I'm familiar with creating cron jobs in linux. 回答1: If I understand what you're looking for, you'll need to do something a bit messy, like having a cron job that runs a bash script that randomizes the run times... Something like this: crontab: 0 9 * * * /path/to/bashscript and in /path/to/bashscript: #!/bin/bash maxdelay=$((14*60)) # 14 hours from 9am to 11pm,

问题 On Linux, the readlink utility accepts an option -f that follows additional links. This doesn't seem to work on Mac and possibly BSD based systems. What would the equivalent be? Here's some debug information: $ which readlink; readlink -f /usr/bin/readlink readlink: illegal option -f usage: readlink [-n] [file ...] 回答1: readlink -f does two things: It iterates along a sequence of symlinks until it finds an actual file. It returns that file's canonicalized name—i.e., its absolute pathname. If

问题 I'm studying the content of this preinst file that the script executes before that package is unpacked from its Debian archive (.deb) file. The script has the following code: #!/bin/bash set -e # Automatically added by dh_installinit if [ "$1" = install ]; then if [ -d /usr/share/MyApplicationName ]; then echo "MyApplicationName is just installed" return 1 fi rm -Rf $HOME/.config/nautilus-actions/nautilus-actions.conf rm -Rf $HOME/.local/share/file-manager/actions/* fi # End automatically

问题 I have a file that looks like: name: charles key1: how are you? name: erika key2: I'm fine, thanks name: ... How could I remove the new lines that between "key\d+" and "name:"? It should look like this: name: charles key1: how are you? name: erika key2: I'm fine, thanks name: ... I'm trying to use sed or awk but without any success. Is there any way to clean that lines? Is there any way to remove the newlines between "key\d+:" and "\w+:"? 回答1: something like this? kent$ awk '/^key.:/{p=1}/

问题 I have a file that looks like: name: charles key1: how are you? name: erika key2: I'm fine, thanks name: ... How could I remove the new lines that between "key\d+" and "name:"? It should look like this: name: charles key1: how are you? name: erika key2: I'm fine, thanks name: ... I'm trying to use sed or awk but without any success. Is there any way to clean that lines? Is there any way to remove the newlines between "key\d+:" and "\w+:"? 回答1: something like this? kent$ awk '/^key.:/{p=1}/